Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Fabspeed
Fabspeed for Porsche
Here at Fabspeed Motorsport, we are dedicated to delivering our customers the highest quality performance upgrades with the industry’s best lifetime warranty. We have over 29 years experience designing, engineering and installing high performance Porsche exhaust systems, air intake systems and ECU tuning for the world’s most coveted exotic cars. All of our products are designed and engineered right here in Fort Washington, Pennsylvania by our very skilled and passionate fabricators
A Quick Look at Fabspeed
Fabspeed information on this page is based on details supplied by the manufacturer or distributor, plus any OE references provided with the parts.
Choosing the Right Fit for Your Porsche
Where Fabspeed is listed for Porsche, use the supplied model coverage and OE references to confirm suitability. Check details that commonly affect fitment such as model year, side/position, and connector type where relevant.
- Typical reasons people replace these parts include upgrading tired or corroded factory exhaust components, tailoring sound and response for fast-road or track use, and supporting wider tuning packages.
- Common symptoms that lead owners to inspect or change related parts include exhaust leaks, rattles, drone, heat-related fatigue, and loss of performance that may also be linked to boost or vacuum issues.
- After installation, it is sensible to refresh mounts and hardware where worn, and to carry out a careful check for leaks once everything has heat-cycled.
- Consider whether supporting ECU mapping or health checks are appropriate for your Porsche, depending on how extensive your hardware changes are.
Browse by Category
If you already know the area you are working on, start with the category and then filter by Porsche model. Where real-world symptoms and typical reasons to replace are provided, use them to keep the wording grounded.
Engine Tuning — Engine tuning parts and upgrades for Porsche are used to improve drivability, throttle response and power, or to support changes such as intake, exhaust, or forced induction. They are typically chosen once the engine is in good health, as tuning cannot compensate for underlying mechanical faults.
- Before any significant tuning work, check overall engine condition, including compression or leak-down where appropriate, fuel system health, sensor data, and that there are no boost or vacuum leaks.
- Avoid using calibration changes to hide rough running or misfires, as the mechanical root cause still needs to be addressed.
Air Filters — Air filters for Porsche protect the engine from dirt while maintaining the airflow that correct fuelling and performance depend on. Owners often replace or upgrade filters to restore airflow, support tuning work, or improve serviceability while keeping good filtration.
- Service intervals depend on use: dusty environments or frequent track days may justify more frequent inspection and cleaning or replacement.
- If using oiled performance filters, follow the manufacturer’s oiling instructions carefully to avoid contaminating sensitive airflow sensors.
Air Induction Kits — Induction kits for Porsche replace or re-route parts of the intake system to change airflow, response and sound. They are usually part of a wider tuning package and are selected to balance intake temperatures, flow and sensor stability.
- When fitting an induction kit, ensure joints and connections are well sealed to prevent unmetered air entering the engine or causing drivability issues.
- Positioning and heat management are important: shielding from hot engine-bay air helps keep intake temperatures, and therefore performance, more consistent.
Exhausts — Exhaust upgrades for Porsche are commonly chosen to replace corroded or leaking factory systems, refine the car’s sound, reduce weight or improve gas flow as part of a tuning package. The right choice depends on how the car is used and the balance you want between sound, comfort and responsiveness.
- When planning an exhaust change, consider the complete system, including catalytic converters, to keep within your local emissions and noise requirements.
- Replacing aged gaskets, clamps, mounts and rusted fixings at the same time as the exhaust usually improves fitment and reduces the chance of future leaks or rattles.
All Silencers / Mufflers — This category covers a range of Porsche silencer and muffler layouts, from standard-style replacements to sport and valved options. Selection is usually guided by corrosion or damage to existing parts, unwanted noise or drone, or a desire to change the exhaust character while staying within comfort and usage needs.
- To narrow down the correct layout, compare inlet and outlet positions, hanger locations and pipe diameters on your current system against the product details.
- When choosing between standard, sport or switchable systems, think about typical journeys and cabin noise tolerance so you end up with a sound level that suits day-to-day use.
Explore Fabspeed at Design911
View the current Fabspeed range for Porsche at Design911, then filter by model and category to narrow down to the right parts.
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
Fabspeed Sport Catalytic Converters With Muffler Adapter.
The Fabspeed Sport Catalytic Converters with Muffler Adapter are a high-performance exhaust upgrade designed for the Porsche 911 992 Turbo and Turbo S from 2021 onward.
Fits:
- Porsche 992.1 Turbo 3.8L 2021-24
- Porsche 992.1 Turbo S 3.8L 2021-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2021-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2021-24
The system replaces the restrictive factory catalytic converters and rear muffler arrangement with high-flow German HJS 200 CPSI catalytic converters.
By reducing exhaust restriction downstream of the turbochargers, the system allows exhaust gases to leave the engine more efficiently. This can improve turbocharger response, increase power and torque, reduce exhaust-system weight and produce a substantially more aggressive exhaust note.
Fabspeed's design replaces the original approximately 800-cell catalytic converters with significantly freer-flowing HJS catalysts while retaining catalytic exhaust treatment.
Fabspeed reports dyno gains of up to 47.7 WHP and 47.1 lb-ft of torque, with approximately 54 HP claimed at the crank on its test vehicle. Actual results vary according to vehicle condition, fuel, environmental conditions and accompanying modifications.
What This Product Does:
The catalytic converter sits downstream of the turbocharger and performs two important functions:
- It treats exhaust gases before they leave the vehicle.
- It forms part of the exhaust path through which the turbocharger must discharge exhaust flow.
The Fabspeed system is designed to:
- Reduce restriction after the turbochargers.
- Increase exhaust gas flow.
- Reduce backpressure.
- Improve turbocharger response.
- Allow the VTG turbochargers to spool more quickly.
- Support increased horsepower and torque.
- Increase exhaust volume and character.
- Produce more noticeable turbocharger sound.
- Increase burbles and overrun sound.
- Reduce exhaust-system weight.
- Retain catalytic exhaust treatment.
Catalytic converters operate under extremely high temperatures and can deteriorate through age, contamination or engine faults.
Possible symptoms include:
- Check Engine Light.
- Catalyst-efficiency fault codes.
- Loss of engine power.
- Slower turbo response.
- Increased exhaust backpressure.
- Reduced performance at higher RPM.
- Metallic rattling from inside the catalyst.
- Unusual exhaust smells.
- Excessively high catalyst temperatures.
- Internal catalyst material breaking apart.
- Melted or collapsed catalyst substrate.
- Engine feeling restricted under boost.
- Uneven exhaust flow.
- Failed emissions testing where applicable.
A failing catalyst should be diagnosed properly before replacement because engine-management, fueling or ignition faults may have caused the damage.
Why Replacement / Upgrading Matters:
Replacing restrictive or deteriorated catalysts with a high-flow sport catalyst system can help restore or improve:
- Exhaust gas flow.
- Turbocharger response.
- Power and torque.
- High-load performance.
- Exhaust sound.
- Exhaust-system weight.
- Catalyst reliability.
- Overall performance character.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR992TSCGT2C
The product you are viewing cross references to these numbers
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
The Fabspeed Sport Catalytic Converters with GT2RS Style Outlets + Muffler Adapter are a high-performance exhaust upgrade designed for the Porsche 911 992 Turbo and Turbo S from 2021 onward.
Fits:
- Porsche 992.1 Turbo 3.8L 2021-24
- Porsche 992.1 Turbo S 3.8L 2021-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2021-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2021-24
The system replaces the restrictive factory catalytic converters and rear muffler arrangement with high-flow German HJS 200 CPSI catalytic converters and direct GT2RS-inspired exhaust outlets.
By reducing exhaust restriction downstream of the turbochargers, the system allows exhaust gases to leave the engine more efficiently. This can improve turbocharger response, increase power and torque, reduce exhaust-system weight and produce a substantially more aggressive exhaust note.
Fabspeed's design replaces the original approximately 800-cell catalytic converters with significantly freer-flowing HJS catalysts while retaining catalytic exhaust treatment.
The GT2RS-style outlets create a direct, low-restriction route from the sport catalysts towards the exhaust tips, effectively providing the most free-flowing configuration available within this Fabspeed system while retaining catalytic converters.
Fabspeed reports dyno gains of up to 47.7 WHP and 47.1 lb-ft of torque, with approximately 54 HP claimed at the crank on its test vehicle. Actual results vary according to vehicle condition, fuel, environmental conditions and accompanying modifications.
What This Product Does:
The catalytic converter sits downstream of the turbocharger and performs two important functions:
- It treats exhaust gases before they leave the vehicle.
- It forms part of the exhaust path through which the turbocharger must discharge exhaust flow.
The Fabspeed system is designed to:
- Reduce restriction after the turbochargers.
- Increase exhaust gas flow.
- Reduce backpressure.
- Improve turbocharger response.
- Allow the VTG turbochargers to spool more quickly.
- Support increased horsepower and torque.
- Increase exhaust volume and character.
- Produce more noticeable turbocharger sound.
- Increase burbles and overrun sound.
- Reduce exhaust-system weight.
- Retain catalytic exhaust treatment.
- Replace the factory rear muffler arrangement with GT2RS-style direct outlets.
Symptoms Of Wear Or Failure:
Catalytic converters operate under extremely high temperatures and can deteriorate through age, contamination or engine faults.
Possible symptoms include:
- Check Engine Light.
- Catalyst-efficiency fault codes.
- Loss of engine power.
- Slower turbo response.
- Increased exhaust backpressure.
- Reduced performance at higher RPM.
- Metallic rattling from inside the catalyst.
- Unusual exhaust smells.
- Excessively high catalyst temperatures.
- Internal catalyst material breaking apart.
- Melted or collapsed catalyst substrate.
- Engine feeling restricted under boost.
- Uneven exhaust flow.
- Failed emissions testing where applicable.
A failing catalyst should be diagnosed properly before replacement because engine-management, fueling or ignition faults may have caused the damage.
Why Replacement / Upgrading Matters:
Replacing restrictive or deteriorated catalysts with a high-flow sport catalyst system can help restore or improve:
- Exhaust gas flow.
- Turbocharger response.
- Power and torque.
- High-load performance.
- Exhaust sound.
- Exhaust-system weight.
- Catalyst reliability.
- Overall performance character.
The GT2RS-style outlet configuration also removes much of the restriction and weight associated with the standard rear muffler arrangement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR992TSCGT2WC
The product you are viewing cross references to these numbers
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
The Fabspeed Cat-Back Valved Maxflo Exhaust System is a high-performance replacement exhaust system designed for the Porsche 911 992 Turbo and Turbo S from 2021 onward, including the Turbo “50 Years” edition.
Fits:
- Porsche 992.1 Turbo 3.8L 2021-24
- Porsche 992.1 Turbo S 3.8L 2021-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2021-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2021-24
Engineered to improve exhaust flow, reduce weight and provide a more distinctive turbocharged Porsche exhaust note, the system replaces the restrictive rear section of the factory exhaust while retaining the Porsche Sport Exhaust valve functionality.
When the PSE system is switched off and the exhaust valves are closed, the system provides a quieter and more refined exhaust character suitable for normal road and motorway driving.
When PSE is activated and the valves open, exhaust gases are given a less restrictive path through the system, producing a deeper, more aggressive exhaust note with greater turbo presence, sharper sound and increased volume.
The system is manufactured from CNC mandrel-bent T304L stainless steel and incorporates Fabspeed's cast X-pipe together with Helical Limited aerospace-grade exhaust valves.
Fabspeed's dyno testing recorded gains of up to +48.7 WHP and +53.7 lb-ft of torque, with approximately 55 HP claimed at the crank, although actual results vary according to vehicle specification, fuel, atmospheric conditions and associated modifications.
The system also saves approximately 9.8 lb / 4.4 kg compared with the factory exhaust.
What This Product Does:
The cat-back exhaust carries exhaust gases from the catalytic converter outlets through the rear exhaust system and out of the vehicle.
The Fabspeed Valved Maxflo system is designed to:
- Reduce restriction in the factory rear exhaust system.
- Improve exhaust gas flow.
- Reduce exhaust backpressure.
- Improve turbocharger exhaust flow.
- Support stronger throttle response.
- Support increased horsepower and torque.
- Provide a more aggressive exhaust note when required.
- Retain a quieter exhaust mode for everyday driving.
- Maintain integration with the Porsche PSE system.
- Reduce exhaust-system weight.
- Replace the factory muffler and associated rear exhaust pipework.
- Work with either factory catalysts or compatible Fabspeed sport catalysts.
Symptoms Of Wear Or Failure:
Possible signs of deterioration in the original or aftermarket cat-back exhaust include:
- Exhaust becoming noticeably louder without the valves being commanded open.
- Ticking or blowing noises from exhaust joints.
- Exhaust gases escaping around clamps or flanges.
- Soot marks around exhaust connections.
- Metallic rattling from the rear of the vehicle.
- Exhaust vibration.
- Loose exhaust components.
- Cracked welds.
- Damaged exhaust tubing.
- Corrosion or perforation.
- Exhaust system hanging lower than normal.
- Exhaust tips becoming misaligned.
- Excessive movement during acceleration.
- Increased cabin drone.
- Burning smell caused by exhaust gases or hot components contacting surrounding materials.
- Valve-related noises.
- Exhaust valves failing to open or close.
- Different exhaust sound between the two sides of the vehicle.
- PSE operation no longer changing the exhaust sound correctly.
Why Replacement / Upgrading Matters:
A damaged or excessively restrictive exhaust system can affect both performance and driving enjoyment.
Replacing a worn factory system or upgrading to the Fabspeed Valved Maxflo system can help restore or improve:
- Exhaust flow.
- Turbocharged engine response.
- Exhaust sound.
- PSE valve functionality.
- Exhaust-system sealing.
- Rear exhaust weight.
- Corrosion resistance.
- Overall exhaust durability.
For performance vehicles, maintaining a structurally sound and properly sealed exhaust is particularly important because exhaust gas temperatures and flow rates can be substantial.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR992TVLVQ
The product you are viewing cross references to these numbers
- Porsche 991 GT3 Cup 2018-2019
The Fabspeed Porsche 991 GT3 Cup Sport Headers are a high-performance replacement for the restrictive factory exhaust headers fitted to Porsche 991 GT3 Cup race cars from 2017 onward.
Fits:
- Porsche 991 GT3 Cup 2017-2019
Designed specifically for competition-focused GT3 Cup applications, these headers improve exhaust gas flow and scavenging, helping the naturally aspirated flat-six engine breathe more efficiently throughout the rev range.
The system features one-piece CNC mandrel-bent primary header tubes, a high-velocity motorsport-style merge collector and specially designed inlet flanges. Fabspeed manufactures the system from a combination of T321 and T304 stainless steel for strength, corrosion resistance and durability under extreme exhaust temperatures.
Integrated German-made HJS 200-cell tri-metallic sport catalytic converters provide substantially increased exhaust flow compared with more restrictive factory catalysts while retaining catalytic treatment.
Fabspeed lists a performance gain of up to approximately 15 HP, although actual output will vary according to vehicle specification, setup and operating conditions. The system also removes approximately 1 kg / 2 lb from the rear of the vehicle compared with the factory arrangement.
What This Product Does:
The exhaust headers collect combustion gases as they leave the engine's individual cylinders and direct them into the remainder of the exhaust system.
On a high-revving GT3 Cup engine, efficient exhaust flow is especially important because the engine must move large volumes of exhaust gas at high RPM.
The Fabspeed Sport Headers are designed to:
- Reduce exhaust restriction.
- Improve exhaust gas velocity.
- Improve cylinder scavenging.
- Reduce pumping losses.
- Support stronger high-RPM performance.
- Improve throttle response.
- Increase potential horsepower.
- Maintain efficient exhaust flow during sustained track use.
- Reduce unnecessary weight at the rear of the vehicle.
- Provide high-flow catalytic treatment through HJS sport catalysts.
Symptoms Of Wear Or Failure:
Competition exhaust systems experience extreme temperatures, vibration and repeated thermal cycling.
Possible symptoms of worn or damaged headers include:
- Ticking or tapping noise from the exhaust area.
- Exhaust note becoming louder than normal.
- Exhaust gases leaking near the cylinder heads.
- Soot marks around header flanges.
- Cracks in the header tubing.
- Cracked welds.
- Distorted mounting flanges.
- Loose mounting hardware.
- Failed exhaust gaskets.
- Rattling from the catalytic converter area.
- Reduced throttle response.
- Loss of high-RPM performance.
- Increased exhaust backpressure.
- Engine-management warning lights.
- Catalyst-efficiency fault codes.
- Unusual exhaust smells.
- Excessive heat around nearby components.
Because GT3 Cup vehicles are subjected to sustained competition use, regular inspection of the exhaust system is particularly important.
Why Replacement / Upgrading Matters:
A GT3 Cup engine depends on efficient airflow at both the intake and exhaust sides of the combustion process.
Restrictive, cracked or damaged headers can reduce the efficiency with which exhaust gases leave the engine.
Replacing worn components or upgrading to a higher-flow header system can help restore or improve:
- Exhaust gas flow.
- Cylinder scavenging.
- Engine responsiveness.
- High-RPM power delivery.
- Exhaust sealing.
- Thermal management.
- Competition reliability.
- Overall exhaust-system efficiency.
For a race car, maintaining predictable performance across repeated high-load sessions is especially important.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR991CUPSHDR
The product you are viewing cross references to these numbers
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 911 (997) GT3 CUP 2010
- Porsche 991 GT3 Cup 2016
The Fabspeed Porsche 911 GT3 Cup Sport Headers are a high-performance replacement for the restrictive factory exhaust headers fitted to 997 and 991.1-generation Porsche 911 GT3 Cup race cars from 2007–2016.
Fits:
- Porsche 997 MK1 GT3 CUP 2007-09
- Porsche 911 (997) GT3 CUP 2010
- Porsche 991 GT3 Cup 2016
Designed specifically for competition-focused GT3 Cup applications, the system improves exhaust gas flow and scavenging to help the naturally aspirated flat-six engine breathe more efficiently throughout the rev range. The result is improved throttle response and the potential for increased power and torque.
Each header assembly incorporates German-made 200-cell HJS tri-metallic high-flow sport catalytic converters. These performance catalysts are designed to offer substantially less exhaust restriction than conventional catalysts while retaining catalytic treatment of the exhaust gases.
The headers are manufactured from high-quality 14–16 gauge stainless steel using CNC mandrel-bent tubing and feature high-velocity 3-into-1 pyramidal investment-cast merge collectors. This collector design is intended to improve exhaust scavenging as the individual cylinder exhaust pulses combine.
Fabspeed lists gains of up to 22 HP and 37 units of torque for this product, although actual results depend on the vehicle, engine specification, environmental conditions and accompanying modifications. The manufacturer also lists a reduction in weight compared with the factory arrangement.
What This Product Does:
The exhaust headers collect exhaust gases leaving each cylinder and direct them towards the remainder of the exhaust system.
On a high-revving naturally aspirated race engine such as the GT3 Cup flat-six, header design has a significant effect on the speed and efficiency with which exhaust gases leave the combustion chambers.
The Fabspeed Sport Headers are designed to:
- Reduce restriction compared with the factory header arrangement.
- Improve exhaust gas velocity.
- Promote more effective cylinder scavenging.
- Reduce exhaust backpressure.
- Allow the engine to expel combustion gases more efficiently.
- Improve throttle response.
- Support increased horsepower and torque.
- Maintain high exhaust flow at elevated engine speeds.
- Improve performance across the usable RPM range.
- Provide high-flow catalytic conversion through the HJS sport catalysts.
Symptoms Of Wear Or Failure:
Exhaust headers operate in an extremely demanding environment and are exposed to intense heat, vibration and repeated thermal cycling.
Possible symptoms of deteriorated factory or aftermarket headers include:
- Ticking or tapping noises from the exhaust area.
- Exhaust noise becoming louder than normal.
- Exhaust gases escaping around the cylinder-head flange.
- Soot deposits around header joints or welds.
- Cracks in the header tubing.
- Cracked or damaged welds.
- Distorted exhaust flanges.
- Loose header fasteners.
- Damaged exhaust gaskets.
- Rattling noises from the catalytic converters.
- Metallic noises from loose catalyst material.
- Reduced engine performance.
- Slower throttle response.
- Increased exhaust backpressure.
- Engine-management warning lights.
- Catalyst-efficiency fault codes.
- Unusual exhaust smells.
- Excessive heat around surrounding components.
Race cars should be inspected regularly because repeated high-temperature track operation can accelerate fatigue of exhaust components.
Why Replacement / Upgrading Matters:
Efficient exhaust flow is essential to extracting maximum performance from a GT3 Cup engine.
A restrictive, damaged or leaking exhaust header can interfere with exhaust scavenging and reduce engine efficiency.
Replacing worn factory components or upgrading to the Fabspeed Sport Headers can help restore or improve:
- Exhaust gas flow.
- Cylinder scavenging.
- Throttle response.
- High-RPM performance.
- Engine breathing.
- Power and torque potential.
- Exhaust-system sealing.
- Competition reliability.
For a race vehicle, consistent performance is as important as peak output. Exhaust leaks or deteriorating components can become progressively worse under sustained track temperatures.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR997CUPSHDR
The product you are viewing cross references to these numbers
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
The Fabspeed Sport Catalytic Converters with GT2RS Style Outlets + Muffler Adapter are a high-performance exhaust upgrade for the Porsche 911 992 Carrera, designed to reduce exhaust restriction, improve turbo response and deliver a significantly more sporting exhaust character.
Fits:
- Porsche 992.1 Carrera 2 3.0L 2021-24
- Porsche 992.1 Carrera 4 3.0L 2021-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2021-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2021-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
The system replaces the restrictive factory catalytic converters with German HJS 200-CPSI high-flow catalytic converters and incorporates GT2RS-inspired direct exhaust outlets with muffler adapter. This configuration creates a freer-flowing path for exhaust gases after the turbochargers while retaining catalytic exhaust treatment.
Manufactured from CNC mandrel-bent 14–16 gauge T304L stainless steel, the system is engineered as a direct bolt-on installation with no cutting or welding required.
What This Product Does:
- Replaces the factory catalytic-converter assemblies.
- Replaces the restrictive original 800-cell catalysts with HJS 200-CPSI units.
- Reduces exhaust backpressure.
- Allows exhaust gases to leave the turbochargers more efficiently.
- Helps improve turbocharger response.
- Supports increased horsepower and torque.
- Creates a more aggressive sports-car exhaust note.
- Increases audible turbocharger sound.
- Uses GT2RS-inspired direct exhaust outlets.
- Retains catalytic exhaust treatment.
- Reduces exhaust-system weight.
- Provides a modular design that can be converted back to a muffled configuration.
- Retains compatibility with the factory muffler using optional adapter pipes.
- Can also be configured with Fabspeed's Valvetronic exhaust.
- Provides a bolt-on installation without cutting or welding.
Fabspeed's HJS catalysts use a much more open internal structure than the original 800-cell units, helping the turbocharged 992 engine move exhaust gases more efficiently.
Symptoms Of Wear Or Failure:
The Fabspeed system is primarily a performance upgrade, but replacement may also be appropriate when the original catalytic converters have deteriorated.
Possible symptoms of a failing or restricted catalyst include:
- Reduced engine power.
- Sluggish acceleration.
- Increased turbo lag.
- Poor throttle response.
- Engine feeling restricted at higher RPM.
- Difficulty producing normal power under heavy load.
- Check engine warning light.
- Catalyst-efficiency fault codes.
- Rattling or metallic noises from inside a catalytic converter.
- Excessive heat from the catalyst housing.
- Strong or unusual exhaust odours.
- Increased emissions.
- Failed emissions testing.
- Exhaust leaks around joints or flanges.
- Visible damage to the catalyst housing.
- Poor fuel economy.
- Abnormally high exhaust backpressure.
A partially blocked catalyst may be relatively difficult to notice during light driving but become increasingly restrictive as exhaust-gas volume rises under acceleration.
Why Replacement Matters:
Catalytic converters sit directly downstream of the turbochargers and therefore have a significant influence on exhaust flow.
If the internal substrate becomes damaged, contaminated, melted or partially blocked, exhaust gases cannot pass through efficiently.
This increases backpressure and can result in:
- Reduced engine performance.
- Slower turbo response.
- Increased exhaust temperatures.
- Poor high-RPM performance.
- Increased load on the turbocharged exhaust system.
- Engine-management faults.
- Reduced emissions-control effectiveness.
Replacing a damaged or restrictive catalyst restores a clear exhaust path and proper catalytic function.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR992SCGT2WC
The product you are viewing cross references to these numbers
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
The Fabspeed Sport Catalytic Converters With Muffler Adapter Only are a high-performance exhaust upgrade for the Porsche 911 992 Carrera, designed to reduce exhaust restriction, improve turbo response and deliver a significantly more sporting exhaust character.
Fits:
- Porsche 992.1 Carrera 2 3.0L 2021-24
- Porsche 992.1 Carrera 4 3.0L 2021-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2021-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2021-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
The system replaces the restrictive factory catalytic converters with German HJS 200-CPSI high-flow catalytic converters. This configuration creates a freer-flowing path for exhaust gases after the turbochargers while retaining catalytic exhaust treatment.
Fabspeed's modular design also provides flexibility. The adapter pipes, allow the sport catalysts to be used with the factory rear muffler or Fabspeed Valvetronic exhaust if a quieter configuration is preferred.
Manufactured from CNC mandrel-bent 14–16 gauge T304L stainless steel, the system is engineered as a direct bolt-on installation with no cutting or welding required.
What This Product Does:
- Replaces the factory catalytic-converter assemblies.
- Replaces the restrictive original 800-cell catalysts with HJS 200-CPSI units.
- Reduces exhaust backpressure.
- Allows exhaust gases to leave the turbochargers more efficiently.
- Helps improve turbocharger response.
- Supports increased horsepower and torque.
- Creates a more aggressive sports-car exhaust note.
- Increases audible turbocharger sound.
- Retains catalytic exhaust treatment.
- Reduces exhaust-system weight.
- Provides a modular design that can be converted back to a muffled configuration.
- Retains compatibility with the factory muffler using optional adapter pipes.
- Can also be configured with Fabspeed's Valvetronic exhaust.
- Provides a bolt-on installation without cutting or welding.
Fabspeed's HJS catalysts use a much more open internal structure than the original 800-cell units, helping the turbocharged 992 engine move exhaust gases more efficiently.
Symptoms Of Wear Or Failure:
The Fabspeed system is primarily a performance upgrade, but replacement may also be appropriate when the original catalytic converters have deteriorated.
Possible symptoms of a failing or restricted catalyst include:
- Reduced engine power.
- Sluggish acceleration.
- Increased turbo lag.
- Poor throttle response.
- Engine feeling restricted at higher RPM.
- Difficulty producing normal power under heavy load.
- Check engine warning light.
- Catalyst-efficiency fault codes.
- Rattling or metallic noises from inside a catalytic converter.
- Excessive heat from the catalyst housing.
- Strong or unusual exhaust odours.
- Increased emissions.
- Failed emissions testing.
- Exhaust leaks around joints or flanges.
- Visible damage to the catalyst housing.
- Poor fuel economy.
- Abnormally high exhaust backpressure.
A partially blocked catalyst may be relatively difficult to notice during light driving but become increasingly restrictive as exhaust-gas volume rises under acceleration.
Why Replacement Matters:
Catalytic converters sit directly downstream of the turbochargers and therefore have a significant influence on exhaust flow.
If the internal substrate becomes damaged, contaminated, melted or partially blocked, exhaust gases cannot pass through efficiently.
This increases backpressure and can result in:
- Reduced engine performance.
- Slower turbo response.
- Increased exhaust temperatures.
- Poor high-RPM performance.
- Increased load on the turbocharged exhaust system.
- Engine-management faults.
- Reduced emissions-control effectiveness.
Replacing a damaged or restrictive catalyst restores a clear exhaust path and proper catalytic function.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR992SCGT2C
The product you are viewing cross references to these numbers
- Porsche 996 GT2 2001-05
The Fabspeed Porsche 996 GT2 Sport Performance Package is a comprehensive intake, exhaust and ECU tuning upgrade designed to improve the performance, response and sound of the Porsche 996 GT2.
Fits:
- Porsche 996 GT2 2001-05
Package Includes:
- Fabspeed Supersport X-Pipe exhaust system.
- German HJS 200-cell high-flow sport catalytic converters.
- Fabspeed Sport Performance Headers.
- High-velocity 3-into-1 header merge collectors.
- High Performance Air Intake system.
- Dual-conical dry-style performance air filters.
- Deluxe X-50 Style exhaust tips.
- Custom Fabspeed XperTune Performance Software.
- Handheld ECU programming device.
Rather than upgrading a single component, the package addresses several major areas that influence the performance of the turbocharged engine. Freer-flowing exhaust headers improve the path for gases leaving the cylinder heads, high-flow HJS sport catalytic converters reduce exhaust restriction, the performance intake increases airflow to the engine, and custom XperTune software recalibrates the ECU to work with the upgraded hardware.
The package also includes Fabspeed's Supersport X-Pipe exhaust system and Deluxe X-50 Style exhaust tips, providing a more aggressive exhaust character and updated rear appearance.
Fabspeed describes the system as a direct bolt-on replacement for the original exhaust components and uses T304 stainless-steel construction with CNC mandrel-bent tubing and high-velocity merge collectors in the performance headers. The included sport catalysts use German-made HJS 200-cell substrates.
What This Product Does:
- Improves exhaust flow from the cylinder heads.
- Reduces restriction through the exhaust and catalytic-converter sections.
- Helps exhaust gases leave the turbochargers more efficiently.
- Supports quicker and more responsive turbocharger operation.
- Improves engine breathing through the performance intake.
- Allows increased airflow through reusable high-performance filters.
- Improves exhaust scavenging through the performance headers.
- Optimises ECU calibration for the upgraded hardware.
- Improves horsepower and torque potential.
- Sharpens throttle response.
- Produces a stronger, more sporting exhaust note.
- Enhances turbocharger sound.
- Replaces several restrictive original intake and exhaust components as one coordinated package.
- Provides a more performance-oriented rear appearance through X-50-style exhaust tips.
Fabspeed specifically states that its Sport Performance Headers use high-velocity 3-into-1 pyramidal investment-cast merge collectors designed to improve exhaust scavenging and support faster boost response.
Symptoms Of Wear Or Failure:
This performance package is primarily an upgrade rather than a conventional replacement service item. However, ageing original exhaust, catalyst and intake components can develop faults that make replacement or upgrading worthwhile.
Possible symptoms include:
- Reduced engine power.
- Sluggish acceleration.
- Increased turbo lag.
- Poor throttle response.
- Engine feeling restricted at higher RPM.
- Exhaust rattles.
- Metallic noises from deteriorating catalytic-converter substrates.
- Exhaust leaks around manifolds, joints or flanges.
- Ticking noises from cracked or leaking headers.
- Soot deposits around exhaust joints.
- Excessive exhaust heat.
- Catalyst-efficiency fault codes.
- Increased emissions.
- Failed emissions testing.
- Corrosion around exhaust components.
- Damaged exhaust flanges or mounting hardware.
A partially blocked catalytic converter can become particularly noticeable under heavy load, where the engine produces a much larger volume of exhaust gas.
Why Replacement / Upgrading Matters:
The Porsche 996 GT2 relies on efficient airflow both into and out of its turbocharged engine.
Restriction before the turbocharger on the intake side can limit the amount of air available to the engine, while excessive restriction after combustion can make it more difficult for exhaust gases to leave efficiently.
Addressing both sides together can help improve the overall breathing efficiency of the engine.
The package is designed to:
- Increase intake airflow.
- Improve exhaust evacuation.
- Reduce exhaust restriction.
- Improve turbo response.
- Improve throttle response.
- Support increased power and torque.
- Coordinate hardware changes with appropriate ECU calibration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR996GT2SPKGE
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 996 GT2 2001-05
The Fabspeed XperTune Performance Software is a custom ECU calibration developed for the Porsche 996 GT2 3.6L, 2001–2005. Designed to optimise the factory engine-management strategy, the software recalibrates key parameters such as fuelling, sensor inputs and boost control to improve horsepower, torque, throttle response and overall drivability.
Fits:
- Porsche 996 GT2 2001-05
Rather than requiring the vehicle's ECU to be removed and sent away for bench flashing, the XperTune system uses a supplied handheld programming device connected through the vehicle's OBD-II port. The original ECU data is read from the vehicle and used by Fabspeed to create a calibration matched to the vehicle's specification and modifications.
Fabspeed publishes output figures of 505 hp and 502 lb-ft compared with its quoted stock figures of 450 hp and 457 lb-ft, representing claimed gains of approximately 55 hp and 45 lb-ft. Actual results can vary according to vehicle condition, fuel quality, modifications and operating conditions.
What This Product Does:
- Reprograms the engine ECU with a performance-oriented calibration.
- Optimises engine-management parameters for increased performance.
- Adjusts fuelling strategies to suit the engine and vehicle specification.
- Optimises boost-pressure control where applicable.
- Improves throttle response and engine drivability.
- Supports increased horsepower and torque.
- Allows the calibration to be tailored to existing vehicle modifications.
- Removes the need to physically remove and ship the ECU for tuning.
- Allows the factory calibration to be restored using the supplied handheld device.
- Provides a reusable programming method for switching between the original and Fabspeed calibration on the same vehicle.
The tune is created using the original ECU file together with information about the vehicle and any installed performance modifications.
When XperTune Should Be Considered:
This software may be appropriate when:
- Additional horsepower and torque are desired.
- The vehicle remains mechanically healthy but improved performance is required.
- Performance exhaust components have been installed.
- Intake or intercooler upgrades have been fitted.
- The ECU needs to be calibrated around existing modifications.
- Improved throttle response is desired.
- The owner wants an OBD-II flashing solution without removing the ECU.
- The ability to return the vehicle to its original calibration is desirable.
How The Tuning Process Works:
The supplied handheld programmer connects to the Porsche through the OBD-II diagnostic port.
The process involves:
- Reading the factory ECU data using the handheld programmer.
- Connecting the handheld device to a Windows PC.
- Supplying the original ECU data and vehicle specification to Fabspeed.
- Fabspeed creating a calibration based on the supplied vehicle information.
- Loading the custom tune onto the handheld programmer.
- Flashing the new calibration into the vehicle ECU through the OBD-II port.
The original calibration remains available so the ECU can later be returned to stock using the handheld device.
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
The Fabspeed RENNKRAFT Modular Headers with HJS Catalytic Converters are a high-performance exhaust manifold and catalyst upgrade developed for the Porsche 911 997.2 Carrera.
Fits:
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
Designed to replace the factory header and catalytic-converter assemblies, the system combines freer-flowing tubular headers with German-made HJS HD tri-metallic 200-cell high-flow catalytic converters. The objective is to improve exhaust scavenging, reduce restriction and enhance engine response while retaining catalytic exhaust-gas treatment.
Fabspeed's patented RENNKRAFT modular design uses quick-release V-band connections between the headers and catalyst sections. This allows the HJS sport catalysts to be removed independently if servicing is required and enables compatible QUICKTRACK cat-bypass sections to be installed for appropriate track-only competition use.
The headers are manufactured from CNC mandrel-bent T304L stainless steel and use high-velocity merge collectors designed to improve exhaust-gas scavenging. Fabspeed states performance gains of approximately 25 hp and 20 lb-ft of torque on its development application, although actual results will vary according to vehicle condition, specification, fuel, exhaust configuration and operating conditions.
What This Product Does:
- Replaces the original exhaust manifolds and catalytic-converter sections.
- Improves the path for exhaust gases leaving the cylinder heads.
- Uses performance-oriented merge collectors to improve exhaust scavenging.
- Reduces restriction compared with the standard exhaust arrangement.
- Uses HJS 200-cell high-flow catalysts for improved gas flow.
- Helps improve throttle response and engine breathing.
- Can support increased horsepower and torque.
- Produces a sportier and more defined exhaust note.
- Enhances off-throttle burbles and higher-frequency exhaust tones.
- Retains catalytic exhaust-gas treatment when the HJS sport cats are fitted.
- Provides individually replaceable catalyst sections.
- Uses V-band connections for easier servicing and configuration changes.
- Allows compatible track-only bypass sections to be fitted without replacing the complete header assembly.
- Works with exhaust systems designed to connect to the factory-style Porsche header location.
Fabspeed states that the HJS catalyst configuration flows approximately 90–93% of an equivalent straight pipe, providing high exhaust-flow capacity while retaining a catalytic substrate.
Symptoms Of Wear Or Failure:
The original exhaust system is exposed to continuous heat cycles, vibration, moisture and corrosive exhaust gases. Over time, the manifolds, joints and catalytic converters can deteriorate.
Possible symptoms include:
- Exhaust ticking or tapping noises, especially when cold.
- Exhaust leaks around header flanges or joints.
- Soot deposits around leaking connections.
- Increased exhaust noise.
- Exhaust fumes or unusual smells around the rear of the vehicle.
- Loss of engine performance.
- Poor throttle response.
- Engine feeling restricted at higher RPM.
- Increased fuel consumption.
- Check engine warning light.
- Catalyst-efficiency fault codes.
- Rattling from inside a catalytic converter.
- Metallic noises caused by a loose catalyst substrate.
- Excessive heat around one catalytic converter.
- Failed emissions testing.
- Cracked or damaged exhaust manifolds.
- Corroded exhaust hardware or flanges.
- Damaged catalyst substrate caused by overheating or misfires.
A partially restricted catalytic converter may cause relatively normal operation at low engine speeds but increasingly restrict the engine as airflow demand rises.
Why Replacement Matters:
The exhaust headers and catalytic converters are positioned directly in the path of exhaust gases leaving the engine.
If a manifold develops a leak, exhaust gases can escape before reaching the remainder of the exhaust system. This can affect noise, emissions and engine-management readings.
If a catalytic converter becomes internally damaged or restricted, exhaust backpressure can increase. The engine then has to work harder to push exhaust gases out of the cylinders, potentially reducing performance.
Replacing worn or restrictive components can help restore:
- Efficient exhaust flow.
- Strong throttle response.
- Consistent engine performance.
- Proper catalytic-converter operation.
- Reliable exhaust sealing.
- Correct exhaust sound.
- Reduced unwanted exhaust leakage.
- More effective engine breathing.
A performance header and sport-cat system can also reduce restriction beyond the level offered by the original components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR9972MHSC
The product you are viewing cross references to these numbers
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
The Fabspeed RENNKRAFT Sport Cat and Competition Link Pipe system is a performance exhaust upgrade designed for the Porsche 964 Turbo. It replaces the restrictive original catalytic converter section with Fabspeed's interchangeable RENNKRAFT system, allowing the exhaust configuration to be changed between an HJS 200-cell high-flow sport catalytic converter and a straight-through competition link pipe.
Fits:
- Porsche 964 (911) TURBO 3.3L 1990-94
- Porsche 964 (911) TURBO 3.6L 1990-94
The sport catalyst configuration is designed to improve exhaust flow while retaining catalytic exhaust-gas treatment, while the competition link pipe provides the least restrictive exhaust path for appropriate track and competition use.
The system retains the original Porsche rear mufflers, allowing the vehicle to preserve a largely factory rear appearance while benefiting from reduced exhaust restriction, a stronger exhaust character and more noticeable turbocharger sound.
Constructed from 3-inch, 14–16 gauge T304L stainless-steel tubing, the system uses CNC mandrel bends to maintain a smooth internal exhaust path and provide durability under the high temperatures generated by the turbocharged flat-six engine.
What This Product Does:
- Replaces the restrictive original catalytic-converter section.
- Provides interchangeable sport-cat and competition-pipe configurations.
- Uses a high-flow HJS 200-cell catalytic converter in the catted configuration.
- Reduces exhaust restriction after the turbocharger.
- Helps improve exhaust-gas flow.
- Can help reduce turbo lag.
- Supports improved turbocharger response.
- Produces a more pronounced exhaust note.
- Increases audible turbo whistle.
- Retains the original Porsche rear mufflers.
- Allows the vehicle to maintain a relatively factory-looking rear exhaust installation.
- Provides a straight-through competition configuration for suitable track applications.
- Uses stainless-steel construction for long-term corrosion resistance.
- Provides a direct replacement for the factory catalytic-converter section.
Fabspeed states that the HJS 200-cell catalyst flows approximately 93% as much as a straight pipe, providing a balance between catalytic treatment and performance-oriented exhaust flow.
Symptoms Of Wear Or Failure:
A Porsche 964 Turbo's original catalytic converter can deteriorate after decades of heat cycles, vibration and exposure to high exhaust temperatures.
Possible signs of deterioration or restriction include:
- Reduced engine power.
- Sluggish acceleration.
- Slow turbo response.
- Increased turbo lag.
- Engine feeling restricted at higher RPM.
- Poor performance under heavy load.
- Excessive exhaust backpressure.
- Increased exhaust-gas temperatures.
- Unusual heat around the catalytic converter.
- Rattling from inside the converter.
- Metallic noises caused by a loose catalyst substrate.
- Strong or unusual exhaust smells.
- Failed emissions testing.
- Increased exhaust emissions.
- Visible corrosion or damage to the converter housing.
- Exhaust leaks around flanges or joints.
A partially blocked catalyst may allow relatively normal operation at low engine speeds but increasingly restrict exhaust flow as engine speed and load increase.
Why Replacement Matters:
The catalytic converter sits directly downstream within the turbocharged exhaust system, meaning its ability to flow exhaust gases can have a significant influence on engine and turbocharger performance.
As an old catalyst deteriorates, its internal substrate can:
- Break apart.
- Become contaminated.
- Melt or deform.
- Collapse internally.
- Become increasingly restrictive.
A restricted catalyst creates additional pressure after the turbocharger, making it more difficult for exhaust gases to leave the turbine efficiently.
Replacing an ageing or restrictive factory catalyst with a correctly designed high-flow system can help restore:
- Efficient exhaust flow.
- Turbocharger response.
- Throttle response.
- High-RPM performance.
- Correct exhaust-system operation.
- More consistent engine performance.
- A stronger performance exhaust character.
NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.
If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR964TSCCB
The product you are viewing cross references to these numbers
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
The Fabspeed HJS High-Flow Sport Catalytic Converter is a performance exhaust upgrade for the Porsche 964 Turbo, C2 Turbo designed to replace an ageing, restrictive or previously removed original catalytic converter.
Fits:
- Porsche 964 (911) TURBO 3.3L 1990-94
- Porsche 964 (911) TURBO 3.6L 1990-94
At the heart of the system is a 200-cell HJS high-flow catalytic converter, engineered to reduce exhaust emissions while providing substantially less restriction than older factory catalyst technology. The system is manufactured using 14–16 gauge CNC mandrel-bent T304L stainless steel, providing a durable, corrosion-resistant exhaust path designed for improved gas flow.
By reducing exhaust restriction after the turbocharger, the sport catalyst can help the turbocharged flat-six breathe more efficiently, supporting improved throttle response and performance while retaining catalytic exhaust-gas treatment.
What This Product Does:
- Replaces the original catalytic converter section.
- Converts harmful exhaust pollutants before gases leave the exhaust system.
- Provides significantly greater exhaust flow than an ageing or restrictive factory catalyst.
- Reduces exhaust backpressure after the turbocharger.
- Helps improve throttle response.
- Can support improved turbo response and engine performance.
- Provides a performance-oriented alternative to an original 1990s catalytic converter.
- Restores catalytic-converter functionality on vehicles where the original catalyst has previously been removed.
- Uses a high-flow 200-cell HJS catalyst rather than a conventional dense factory-style catalyst.
- Uses stainless-steel construction for corrosion resistance and durability.
- Retains catalytic treatment while offering flow characteristics closer to a less restrictive exhaust system.
Fabspeed states that its HJS high-flow catalysts can flow at more than 90% of the rate of a straight pipe in applicable installations while still providing catalytic exhaust-gas treatment.
Symptoms Of Wear Or Failure:
An original catalytic converter can deteriorate internally after decades of heat cycles, vibration and exposure to exhaust gases.
Possible symptoms include:
- Noticeable loss of engine power.
- Poor throttle response.
- Sluggish turbo response.
- Engine feeling restricted at higher RPM.
- Difficulty achieving full boost or performance.
- Excessive exhaust backpressure.
- Increased exhaust temperatures.
- Rattling noises from inside the catalytic converter.
- Metallic noises caused by a loose or broken catalyst core.
- Strong or unusual exhaust smells.
- Failed emissions testing.
- Increased exhaust emissions.
- Catalyst housing becoming excessively hot.
- Reduced fuel economy.
- Engine running poorly under load.
- Visible corrosion or damage to the original converter.
- Exhaust leaks around the converter or flanges.
A partially blocked catalyst may allow the engine to run reasonably well at low speed but restrict exhaust flow increasingly as engine speed and load rise.
Why Replacement Matters:
The catalytic converter sits directly in the exhaust path, so its internal condition has a major influence on both emissions performance and exhaust flow.
As the catalyst ages, the internal substrate can deteriorate, melt, become contaminated or break apart. A damaged catalyst may become increasingly restrictive, creating excessive exhaust backpressure.
On a turbocharged engine, restriction after the turbocharger is particularly undesirable because the turbocharger must push exhaust gases through the converter.
Replacing a worn or restrictive converter can help restore:
- Proper exhaust flow.
- Turbocharger response.
- Throttle response.
- Engine performance.
- Exhaust-gas treatment.
- Correct operating temperatures.
- Reliable exhaust-system operation.
NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.
If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR964TSC
The product you are viewing cross references to these numbers
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
The Fabspeed Porsche 991.2 Carrera Valved Center Muffler Bypass X-Pipe is a performance exhaust upgrade developed specifically for 2017–2019 Porsche 991.2 Carrera 3.0L twin-turbo models originally equipped without Porsche Sport Exhaust (PSE).
Fits:
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
The system replaces the large factory centre muffler section with a freer-flowing valved X-pipe arrangement, giving non-PSE cars the ability to switch between a more restrained exhaust character and a significantly more aggressive sports-car sound.
Manufactured from polished T304L stainless steel, the system uses premium UK-manufactured Helical vacuum-actuated exhaust valves and includes Fabspeed Deluxe Dual Style exhaust tips in a choice of finishes.
Fabspeed currently publishes:
- +17 horsepower
- +23 lb-ft torque
- 10 lb / 4.5 kg weight reduction
For a mechanically healthy vehicle, this product is primarily a sound, performance and weight-reduction upgrade, rather than a maintenance replacement.
What This Product Does:
The factory centre muffler reduces exhaust noise and provides the refinement expected from a standard road car.
The Fabspeed Valved Center Muffler Bypass replaces this restrictive centre section with a freer-flowing X-pipe and controllable exhaust valves.
The system is designed to:
- Increase exhaust flow
- Reduce centre-muffler restriction
- Increase exhaust sound
- Provide two different exhaust sound levels
- Increase horsepower and torque
- Reduce exhaust-system weight
- Enhance turbocharged flat-six character
- Retain the factory catalytic converters
- Maintain a direct bolt-on layout
- Upgrade the visible exhaust outlets with Deluxe Dual Style tips
Symptoms Of Wear Or Failure:
The factory muffler is exposed to substantial heat, moisture, vibration and repeated temperature changes.
Possible symptoms of deterioration include:
- Metallic rattling
- Internal muffler buzzing
- Exhaust blowing
- Hissing noises
- Cracked welds
- Corrosion
- Loose mounting brackets
- Black soot around leaking joints
- Exhaust vibration
- Muffler movement
- Exhaust tips sitting out of alignment
- Unexpected increase in exhaust noise
A metallic noise should be diagnosed carefully because heat shields, clamps or neighbouring exhaust components can cause similar symptoms.
Why Replacement Matters:
If the original centre muffler is physically damaged or leaking, replacement helps restore:
- A sealed exhaust path
- Correct exhaust alignment
- Secure mounting
- Controlled exhaust noise
- Proper clearance from surrounding components
Exhaust leaks can allow hot gases to escape close to heat-sensitive components and can create excessive noise or soot deposits.
However, if the original muffler is still healthy, installing the Fabspeed system is primarily an upgrade for sound, performance, valve control and weight reduction.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR9912VLV
The product you are viewing cross references to these numbers
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
The Fabspeed Porsche 991 Carrera RENNKRAFT Modular Headers with HJS Catalytic Converters are a high-performance exhaust manifold and sport-catalyst upgrade developed for Porsche 991 Carrera models from 2012–2016.
Fits:
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
Fabspeed’s patented RENNKRAFT® modular design combines performance headers with removable catalyst sections connected by quick-release V-band clamps. In the road-oriented configuration, the system uses German HJS HD tri-metallic 200-cell catalytic converters to provide high exhaust flow while retaining catalytic exhaust treatment.
The headers are manufactured from CNC mandrel-bent T304L stainless steel and incorporate F1-style high-velocity merge collectors intended to improve exhaust scavenging. Fabspeed states that the system was developed from 3D scans of the original Porsche headers to achieve accurate bolt-on fitment.
For a mechanically healthy Porsche, this system is primarily a performance, exhaust-flow and sound upgrade rather than a maintenance replacement.
What This Product Does:
- The exhaust headers collect gases leaving each cylinder and route them toward the catalytic converters and the rest of the exhaust system.
- The factory headers must balance manufacturing cost, packaging, emissions performance, noise control and exhaust flow. The Fabspeed RENNKRAFT system is designed to provide a less restrictive route while improving the way exhaust pulses merge.
- Fabspeed states that the system provides +25 horsepower and +20 lb-ft of torque. These are Fabspeed-published figures from its testing and actual gains may vary according to vehicle condition, fuel, ambient conditions and the remainder of the exhaust system.
- The header system is designed to improve exhaust flow, enhance scavenging, produce a more aggressive exhaust note and create a modular platform that allows catalyst sections to be serviced or changed independently.
Symptoms Of Wear Or Failure:
- Factory exhaust headers are exposed to extremely high temperatures and repeated heating and cooling cycles.
- Possible signs of deterioration include exhaust ticking when cold, blowing or hissing noises, visible cracks, damaged welds, loose flange hardware, black soot around leaking joints, unusual exhaust smells, metallic rattling, increased engine-bay exhaust noise or reduced performance caused by leakage or restriction.
- Leaks often become more noticeable during cold start because gaps can change as the exhaust system reaches operating temperature.
- Catalytic converters can deteriorate through mileage, excessive heat, contamination or underlying engine problems.
- Potential symptoms include a Check Engine Light, catalyst-efficiency fault codes, reduced high-RPM performance, sluggish acceleration, excessive exhaust heat, metallic rattling from inside the catalyst, unusual exhaust smells or a feeling that the engine is unable to breathe freely at higher loads.
- A physically damaged catalyst substrate can break apart or melt, potentially creating exhaust restriction.
Why Replacement Matters:
- A leaking or cracked exhaust header can allow hot exhaust gases to escape before they reach the remainder of the exhaust system.
- This can lead to increased noise, inaccurate oxygen-sensor readings, reduced engine performance and unnecessary heat around nearby components.
- A blocked or damaged catalytic converter can create excessive exhaust restriction. On a naturally aspirated engine such as the 991.1 Carrera, restriction can reduce the engine’s ability to evacuate exhaust gases efficiently and may result in reduced power, poor high-RPM response and increased exhaust temperatures.
- Replacing worn or failed components restores a sealed and properly flowing exhaust path.
- If the original components are still healthy, however, fitting the Fabspeed RENNKRAFT system is mainly a performance and sound upgrade.
NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR991MHSC
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
The Fabspeed Porsche 996 Carrera 4S Deluxe Quad-Style Tips are premium replacement exhaust outlets designed to give the Porsche 996 Carrera 4S a more distinctive quad-exit appearance.
Fits:
- Porsche 996 C4S 3.6L 1999-2004
Manufactured from stainless steel, the tips replace the standard exhaust outlets while retaining the existing muffler system. They are intended for non-Porsche Sport Exhaust (non-PSE) vehicles and can be fitted to compatible factory mufflers or Fabspeed exhaust systems.
Available in Polished Stainless or Satin Black, the Deluxe Quad-Style Tips provide a more aggressive and contemporary rear-end appearance without requiring modification to the bumper or exhaust system.
What This Product Does:
Exhaust tips form the visible final section of the exhaust system.
Their primary functions include:
- Directing exhaust gases away from the rear bumper
- Providing a finished outlet for the exhaust system
- Maintaining correct exhaust outlet positioning
- Protecting the end of the muffler outlet connection
- Enhancing the appearance of the rear of the vehicle
- Allowing the exhaust outlets to be aligned correctly with the bumper openings
The Fabspeed Deluxe Quad-Style Tips replace the standard outlets with a four-outlet appearance, creating a more performance-oriented look.
This product is primarily a styling and exhaust-finishing upgrade. Fabspeed does not publish a horsepower or torque gain specifically for these tips.
Symptoms Of Wear Or Failure:
Exhaust tips are relatively simple components, but they are exposed continuously to heat, moisture, vibration and road contamination.
Common signs of deterioration include:
- Heavy surface corrosion
- Pitting
- Permanent staining
- Excessive carbon deposits
- Heat discolouration
- Peeling or damaged finish
- Dents
- Scratches
- Cracked welds
- Loose mounting connections
- Rattling
- Tips sitting unevenly
- Exhaust outlets contacting the bumper
- Cracks around the inlet or mounting area
- Excessive movement
- Black soot around a leaking connection
Cosmetic deterioration does not always mean the tip is structurally defective, but severe corrosion or damaged mounting points can justify replacement.
Why Replacement Matters:
Replacing damaged exhaust tips helps restore:
- Correct exhaust outlet positioning
- Secure mounting
- Clearance from the rear bumper
- A clean exhaust gas exit path
- Original or upgraded appearance
- Proper alignment between the left and right sides
If a tip becomes severely loose, cracked or corroded, replacement also reduces the risk of the component becoming detached.
Where the original tips remain mechanically sound, fitting the Fabspeed Deluxe Quad-Style Tips is primarily a visual upgrade rather than a repair requirement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR996QDT4
The product you are viewing cross references to these numbers
- Porsche 992.2 Carrera 2 GTS / Spirit 70 3.6L 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L 2024>>
The Fabspeed Porsche 992.2 Carrera GTS Sport Cat is a high-flow catalytic-converter upgrade developed specifically for the 2025+ Porsche 992.2 Carrera GTS T-Hybrid.
Fits:
- Porsche 992.2 Carrera 2 GTS 3.6L 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L 2024>>
Designed as a direct bolt-on replacement for the restrictive factory catalyst arrangement, the Fabspeed Sport Cat improves exhaust-gas flow while retaining catalytic exhaust treatment.
The system is engineered to increase performance, reduce weight and produce a stronger, more motorsport-inspired flat-six exhaust note without converting the vehicle to an uncatalysed exhaust setup.
Fabspeed currently publishes:
- +50 horsepower
- +40 lb-ft torque
- 12 lb weight reduction
For a mechanically healthy vehicle, this product is primarily a performance, sound and weight-reduction upgrade rather than a routine maintenance replacement.
What This Product Does:
The catalytic converter sits in the exhaust stream and treats harmful exhaust gases before they leave the vehicle.
A factory catalyst must balance:
- Emissions control
- Noise requirements
- Durability
- Packaging
- Exhaust flow
The Fabspeed Sport Cat is designed to retain catalytic exhaust treatment while allowing gases to move more freely through the exhaust system.
Its intended benefits include:
- Increased exhaust flow
- Reduced exhaust restriction
- Increased horsepower
- Increased torque
- Reduced exhaust-system weight
- More aggressive exhaust sound
- Improved performance character
- Retained catalytic exhaust treatment
- Direct bolt-on fitment
Symptoms Of Wear Or Failure:
Catalytic converters operate at extremely high temperatures and can deteriorate through age, contamination, impact or engine-related problems.
Possible symptoms include:
- Check Engine Light
- Catalyst-efficiency fault codes
- Reduced engine performance
- Poor high-RPM response
- Increased exhaust restriction
- Internal rattling
- Metallic noises from the catalyst
- Unusually high exhaust temperatures
- Sulphur-like exhaust smell
- Poor throttle response
- Exhaust flow feeling restricted
- Discolouration caused by excessive heat
- Cracks in the catalyst housing or welds
- Exhaust leakage around joints or flanges
A diagnostic inspection should be carried out before replacing a catalyst because oxygen-sensor, ignition, fuelling or engine-management faults can produce similar symptoms.
Why Replacement Matters:
A genuinely failed or restricted catalytic converter can affect:
- Engine performance
- Exhaust flow
- Exhaust temperatures
- Emissions performance
- Turbocharger operating conditions
- Engine-management operation
A severely damaged catalyst can create enough restriction to interfere with normal engine breathing.
Replacing a failed catalyst restores a clear exhaust path and proper catalytic treatment.
Where the factory catalyst is healthy, however, fitting the Fabspeed Sport Cat is primarily a performance upgrade rather than a necessary repair.
NOTE: In the United Kingdom, sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.
If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR9922GTSSC
The product you are viewing cross references to these numbers