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Your Vehicle
Porsche // 991 (911) MK2 2016-2019 // 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
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- Porsche 997 MKII Turbo 2010-13
Porsche 997.2 turbo and turbo S 2010-2013
Fits
Porsche 911 turbo 997 Gen 2
Porsche 911 turbo S 997 Gen 2
The component is perfectly interchangeable with the original components, following the instructions in the constructor's workshop manual
RACETRACK USE ONLY
These components are designed and developed for racetrack use and to maximise the car's performance. They are not street legal and must be installed by professionals in the sector
CATALYTIC CONVERTER REMOVAL - 200 CELLS
Race catalytic converters have fewer cells than standard factory systems. This reduces exhaust back pressure while still maintaining the operation of the catalytic converter, and improves performance and sound
ECU REMAPPING - FOR PERFORMANCE
On turbo cars, catalytic converter replacement may modify turbocharger operating conditions and cause a deterioration of the torque delivery curve. To ensure full benefit from the new racing component, the engine's ECU must be reprogrammed to maximise performance. If the engine warning light comes on, the ECU must always be reprogrammed to eliminate it
SOUND - TUBI SOUND
Tubi Sound is the standard sound of Tubi Style exhausts, louder and more powerful than the original sound. This sound represents our brand
END TIPS DESIGN - OE
The muffler must be used in conjunction with the original exhaust end tips
END TIPS NUMBER AND POSITION - 1 + 1 AT THE SIDES
The tailpipes are located low down at the sides of the car. There is one tailpipe at each side
MATERIAL - AISI 304 STAINLESS STEEL
A choice stainless steel ideal for aggressive environments where combustion emissions can cause serious chemical corrosion on other types of metal
EXHAUST FINISH - POLISHED
Mirror finishes are highly reflective and created by polishing the stainless steel. The polishing process enhances appearance and consistency, making cleaning easier. A special rolling procedure is used. It is essential to remove deep scratches as any surface defects will be very noticeable on the finished product. it improves corrosion resistance. The polishing eradicates crevices where corrosive particles can lodge themselves.
MAIN PIPE DIMENSION 65mm
This is the diameter of the main pipe of the exhaust system
Please note: sports catalytic converters or bypass pipes do have type approval and may not be legally installed on vehicles manufactured after 1st March 2001. They can not be used on a public road and are not MOT compliant, they are designed for race and track cars only.
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Speedster 4.0L (510Bhp) 2019
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
Bypass pipes for side mufflers.
Fits
Porsche 911 GT3 and GT3 RS (991.1 and 991.2 2014-2019)
RACETRACK USE ONLY
These components are designed and developed for racetrack use and to maximise the car's performance. They are not street legal and must be installed by professionals in the sector
Material: Stainless Steel 304
Replacement for Genuine muffler 991.111.048.81
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3606609140
The product you are viewing cross references to these numbers
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Speedster 4.0L (510Bhp) 2019
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
Bypass pipes for side mufflers.
Fits
Porsche 911 GT3 and GT3 RS (991.1 and 991.2 2014-2019)
RACETRACK USE ONLY
These components are designed and developed for racetrack use and to maximise the car's performance. They are not street legal and must be installed by professionals in the sector
Material: Stainless Steel 304
Replacement for Genuine muffler 991.111.048.81
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3606609145
The product you are viewing cross references to these numbers
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
The Fabspeed Center Muffler Bypass X-Pipe is a high-performance exhaust upgrade developed specifically for the Porsche 911 991.2 GT2 RS from 2018 onward, including Weissach and Manthey MR-equipped cars.
Fits:
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
Designed to replace the factory titanium centre muffler, the system provides a freer-flowing exhaust path while retaining the vehicle's original catalytic converters.
At the centre of the system is Fabspeed's investment-cast X-pipe. The crossover allows exhaust gases from the two sides of the engine to merge through a carefully shaped central opening, helping reduce restriction, balance exhaust flow and produce a stronger, more exotic exhaust note.
The system is manufactured from 14–16 gauge T304 stainless steel with larger-diameter CNC mandrel-bent tubing. It provides a durable alternative to the original titanium centre muffler while increasing exhaust sound and supporting improved throttle response and performance.
Fabspeed currently lists a +20 HP performance gain for this product. Actual gains can vary according to vehicle condition, fuel, environmental conditions and other modifications.
What This Product Does:
The Fabspeed X-pipe replaces the original centre muffler in the rear exhaust system.
It is designed to:
- Reduce restriction through the centre exhaust section.
- Improve exhaust gas flow.
- Replace the factory titanium centre muffler.
- Increase exhaust volume.
- Produce a more dynamic GT2 RS exhaust note.
- Improve throttle response.
- Support increased engine performance.
- Retain the original catalytic converters.
- Maintain a catalyst-equipped exhaust configuration.
- Provide a durable stainless-steel replacement for the factory centre muffler.
- Allow straightforward installation and removal using the existing clamped exhaust arrangement.
Symptoms Of Wear Or Failure:
Possible symptoms of deterioration in the original centre muffler include:
- Metallic rattling.
- Exhaust blowing noises.
- Cracks around welds.
- Visible exhaust leakage.
- Soot around damaged joints.
- Increased exhaust noise.
- Muffler casing damage.
- Loose internal components.
- Exhaust vibration.
- Exhaust hanging incorrectly.
- Damaged inlet or outlet connections.
- Exhaust contacting surrounding components.
- Heat-related structural deterioration.
A damaged muffler should be inspected before continued high-load or track use.
Why Replacement Matters:
Replacing a damaged or restrictive centre muffler section helps restore:
- Correct exhaust sealing.
- Safe routing of hot exhaust gases.
- Proper exhaust alignment.
- Structural integrity.
- Consistent exhaust flow.
- Reliable mounting.
Upgrading to the Fabspeed X-pipe additionally provides:
- Increased exhaust sound.
- Reduced centre-section restriction.
- Improved throttle response.
- A more performance-focused exhaust character.
- Retention of the factory catalytic converters.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR9912GT2RSCMX
The product you are viewing cross references to these numbers