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- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
Contains :
1 x Titanium Exhaust Support Bracket 99611312355
1 x Titanium Exhaust Bracket for Rear Muffler 99611322350
2 x Titanium Clamp for Exhaust Catalytic Converter 99951108700
Porsche 996
Diagram Ref no 9 , 10 , 13
Mounted behind the rear bumper under the exhaust, it securely supports the catalytic converter, helping to maintain proper exhaust alignment and absorb vibration without cracking or deforming. If you’re after longevity, performance, or reducing corrosion, this titanium bracket is an excellent upgrade.
You may need to replace the bracket if it shows signs of rust, cracks, bending, or deformation. Other warning signs include rattling or vibration from the exhaust or catalytic converter during acceleration or over bumps, visible misalignment of the exhaust system, or a catalytic converter that hangs too low. Worn hangers or mounts caused by added stress from a weak bracket are also clear indicators. If a damaged bracket is not replaced, the exhaust can sag, shift, or make contact with the underbody, creating damage and unwanted noise. The added strain on other mounts and components can accelerate wear, lead to fractures, or cause heat and vibration damage to nearby parts. Left unchecked, this can result in exhaust leaks, failed emissions tests, or costly repairs to the catalytic converter and exhaust system. You wouldn't do this to your Porsche, would you?
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99611312355TKIT.1
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Exhaust Clamp for Cross Over Pipe - Clamp Made Out of 2 Halves
Maintain a secure and leak-free exhaust system with Exhaust
Clamp, designed for use on the cross over pipe of Porsche 911
models produced between 1975 and 1989. Manufactured from mild steel, this clamp
consists of two matching half sections that bolt together around the exhaust
pipe connection, providing the clamping force required to secure and seal the
joint.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Diagram ref no 11
The cross over pipe forms an important part of the air-cooled Porsche exhaust system, helping direct exhaust gases between engine banks and associated exhaust components. The clamp plays a critical role in maintaining correct pipe alignment while preventing movement, vibration and exhaust leaks.
Over time, original exhaust clamps can become corroded, weakened or damaged due to repeated heat cycles, moisture exposure and road contamination. Replacing worn clamps helps ensure reliable exhaust system operation and supports long-term durability.
What Does an Exhaust Clamp Do?
An exhaust clamp secures adjoining exhaust components together while helping maintain a tight and stable connection.
A properly functioning exhaust clamp helps:
- Secure exhaust pipe joints
- Maintain correct pipe alignment
- Reduce exhaust movement and vibration
- Help prevent exhaust gas leaks
- Support gasket sealing performance
- Improve exhaust system reliability
- Protect connected exhaust components
Without sufficient clamping force, exhaust joints can loosen and allow gases to escape.
Symptoms of Wear or Failure
Exhaust clamps operate in one of the harshest environments on the vehicle and are constantly exposed to heat, corrosion and vibration.
Common signs that replacement may be required include:
- Visible rust or corrosion
- Cracked or weakened clamp sections
- Loose exhaust joints
- Exhaust blowing noises
- Rattling from the exhaust system
- Exhaust leaks around pipe connections
- Soot deposits around clamp areas
- Distorted or damaged clamp halves
- Difficulty maintaining correct torque
A failing clamp can allow excessive movement within the exhaust system, leading to leaks and additional component wear.
Why Replacement Matters
Replacing a worn exhaust clamp helps maintain exhaust system integrity and prevents unnecessary stress on surrounding components.
Benefits include:
- Restores secure pipe connections
- Reduces exhaust leaks
- Improves exhaust system stability
- Minimises vibration and rattles
- Helps maintain proper exhaust flow
- Protects connected pipes and silencers
- Supports reliable long-term performance
- Improves repair and restoration quality
For classic air-cooled Porsche 911 models, replacing ageing exhaust hardware is an important part of maintaining both performance and reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111118700
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Cross Over Pipe Exhaust Sealing Ring
Restore proper exhaust sealing and eliminate unwanted
exhaust leaks with Cross Over Pipe Exhaust Sealing Ring, designed
for Porsche 911 models produced between 1975 and 1989. This sealing ring is
used within the cross over pipe section of the exhaust system, creating a
gas-tight seal between connected exhaust components.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Diagram ref no 13
The cross over pipe is a critical part of the air-cooled Porsche exhaust system, helping balance exhaust gas flow and directing gases efficiently through the exhaust assembly. The sealing ring ensures that exhaust gases remain contained within the system, preventing leaks that can reduce performance, increase noise and affect overall driving enjoyment.
Over time, exhaust sealing rings are subjected to extreme temperatures, vibration, pressure fluctuations and corrosion. As the seal ages, it can become compressed, brittle or damaged, leading to exhaust leaks and reduced system efficiency.
Replacing worn sealing rings whenever exhaust components are removed is essential for maintaining proper exhaust system performance and reliability.
What Does a Cross Over Pipe Exhaust Sealing Ring Do?
The exhaust sealing ring sits between mating exhaust components and creates a heat-resistant seal that prevents exhaust gases from escaping.
A properly functioning sealing ring helps:
- Maintain a leak-free exhaust system
- Ensure correct exhaust gas flow
- Reduce exhaust noise
- Support engine efficiency
- Prevent exhaust fumes escaping at joints
- Maintain correct exhaust back pressure
- Protect surrounding components from hot gas leakage
Without an effective seal, exhaust gases can escape before reaching the silencer system.
Symptoms of Wear or Failure
Exhaust sealing rings naturally deteriorate due to constant exposure to heat and vibration.
Common signs of a failing sealing ring include:
- Exhaust blowing noises
- Ticking sounds from the exhaust system
- Visible soot deposits around joints
- Increased exhaust noise
- Exhaust fumes around the vehicle
- Reduced engine efficiency
- Poor sealing after exhaust disassembly
- Signs of compression or deterioration during inspection
Even a small leak can become progressively worse if the sealing ring is not replaced.
Why Replacement Matters
Replacing a worn exhaust sealing ring helps maintain exhaust system integrity and prevents secondary damage to other exhaust components.
Benefits include:
- Restores leak-free exhaust operation
- Improves exhaust system efficiency
- Reduces unwanted exhaust noise
- Helps maintain correct exhaust flow
- Protects surrounding exhaust components
- Improves repair reliability
- Supports long-term durability
- Enhances restoration quality
For classic air-cooled Porsche 911 models, maintaining correct exhaust sealing is essential for performance, reliability and driving enjoyment.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111118903
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Cross Over Pipe Exhaust Sealing Ring Washer
Restore secure exhaust sealing with Cross Over Pipe Exhaust
Sealing Ring Washer, designed for Porsche 911 models produced from
1975 to 1989. This sealing washer is used on the cross over pipe section of the
exhaust system, helping create a tight, reliable seal between exhaust
components.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Diagram ref no 12
The cross over pipe is exposed to high temperatures, vibration and exhaust gas pressure. The sealing ring washer helps maintain correct joint compression, reducing the risk of exhaust leaks, rattles and poor system alignment. When worn or damaged, the washer may no longer seal effectively, allowing exhaust gases to escape.
Replacing this washer during exhaust repairs, cross over pipe removal or restoration work helps ensure a professional, leak-free installation.
What Does an Exhaust Sealing Ring Washer Do?
An exhaust sealing ring washer supports the sealing joint between exhaust components. It helps maintain clamping pressure and assists the sealing ring or joint in preventing exhaust gases from escaping.
A correctly fitted sealing washer helps provide:
- Secure exhaust joint sealing
- Reduced risk of exhaust leaks
- Correct cross over pipe fitment
- Improved exhaust system stability
- Better gasket and sealing ring performance
- Reduced vibration and exhaust noise
- Reliable long-term exhaust operation
Symptoms of Wear or Failure
Common signs that an exhaust sealing washer may need
replacement include:
- Exhaust blowing noises
- Soot marks around exhaust joints
- Increased exhaust noise
- Rattling from the cross over pipe area
- Poor sealing after exhaust refitting
- Corrosion or distortion of the washer
- Loose or uneven exhaust joint compression
- Exhaust fumes around the rear of the vehicle
Why Replacement Matters
A worn or damaged sealing washer can compromise the exhaust joint, leading to leaks, vibration and premature wear of surrounding exhaust parts.
Replacement helps:
- Restore correct exhaust sealing
- Prevent exhaust gas leaks
- Improve exhaust system reliability
- Reduce unwanted noise and vibration
- Maintain proper exhaust flow
- Protect connected exhaust components
- Improve repair and restoration quality
- Support long-term durability
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111118802
The product you are viewing cross references to these numbers