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Porsche // 964 (911) (1989-1994) // 964 (911) RS 3.8L 1991-93
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Fits:
Porsche 986 Boxster 1997-05
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1997-05
Porsche 996 GT3 1999-05
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99908405202T
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
The OE MATCH Exhaust Gasket, From Cross Over Pipe to Catalyst is a high-quality replacement sealing gasket designed to create a secure, gas-tight connection between the exhaust crossover pipe and catalytic converter. Manufactured to OE specifications, this gasket ensures proper sealing of the exhaust system, preventing leaks while maintaining optimal exhaust flow, engine performance, and emissions control.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Constructed from durable, heat-resistant materials, the gasket is engineered to withstand the extreme temperatures, pressure fluctuations, and vibration encountered within the exhaust system. It is an essential replacement component whenever the catalytic converter or crossover pipe is removed, serviced, or replaced.
What This Product Does:
- Creates a gas-tight seal between the crossover pipe and catalytic converter
- Prevents exhaust gas leaks at exhaust flange connections
- Maintains proper exhaust flow and backpressure characteristics
- Supports engine performance and fuel efficiency
- Helps reduce exhaust noise caused by leaking joints
- Protects emissions system efficiency and catalyst operation
Symptoms Of Wear Or Failure:
- Exhaust blowing, hissing, or ticking noises
- Visible exhaust gas leaks around the catalytic converter connection
- Soot or carbon deposits around the flange area
- Exhaust fumes or odours around the vehicle
- Increased exhaust noise levels
- Reduced exhaust system efficiency
- Potential emissions-related issues or test failures
- Difficulty achieving a proper seal during exhaust repairs
Why Replacement Matters:
- Restores a reliable gas-tight exhaust seal
- Prevents exhaust leaks and unwanted noise
- Maintains correct exhaust flow and system efficiency
- Supports engine performance and emissions control
- Reduces the risk of exhaust fumes escaping from the system
- Protects nearby components from hot exhaust gases
- Helps maintain catalytic converter effectiveness
- Ensures long-term reliability and durability of the exhaust system
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96411119800
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Exhaust Crush Sealing Ring for Heat Exchangers
Sold each - 6 required per car
Restore a gas-tight seal to your Porsche exhaust system with
this OE Match Exhaust Crush Sealing Ring,
designed for the Porsche 964 and Porsche 993 heat exchanger assembly.
Manufactured to original equipment specifications, this premium exhaust sealing
ring compresses during installation to create a secure seal between exhaust
components, preventing exhaust gas leaks while maintaining optimum engine
performance.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Diagram ref no 3
Whether you're replacing heat exchangers, installing a new silencer or carrying out engine or exhaust maintenance, fitting new crush sealing rings is essential to ensure a reliable and leak-free exhaust system.
What Does the Exhaust Crush Sealing Ring Do?
The exhaust crush sealing ring is installed between mating exhaust components where it forms a high-temperature gas seal once compressed during assembly.
Its primary functions include:
- Creating a gas-tight seal between exhaust components.
- Preventing exhaust gas leaks.
- Maintaining correct exhaust back pressure.
- Supporting optimum engine performance.
- Reducing unwanted exhaust noise.
- Helping protect surrounding components from escaping hot exhaust gases.
Because the sealing ring is designed to deform during installation, it provides a highly effective seal capable of withstanding extreme exhaust temperatures.
Why Do Exhaust Crush Sealing Rings Fail?
Exhaust sealing rings operate under constant exposure to
high temperatures and pressure. Common causes of failure include:
- Compression during initial installation.
- Reuse after previous removal.
- Continuous heat cycling.
- Corrosion from moisture and condensation.
- Exhaust system movement.
- Age-related deterioration.
Once compressed, the sealing ring cannot return to its original shape, making it unsuitable for reuse.
When Should the Exhaust Crush Sealing Ring Be Replaced?
Replacement is recommended whenever:
- Heat exchangers are removed.
- Exhaust silencers are replaced.
- Exhaust manifolds are dismantled.
- Exhaust leaks are detected.
- Engine rebuilds are carried out.
- Any exhaust joint using the sealing ring is disturbed.
Most Porsche specialists recommend fitting new crush sealing rings every time the exhaust system is dismantled to guarantee a proper seal and avoid future exhaust leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311119500
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
3 per side. Price is for each.
Fits:
Porsche 964 C2 / C4 / Carrera RS 1989-94
Porsche 993 Carrera / Turbo 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311119500
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
3 required per side
This exhaust seal ring is designed for Porsche 964 and 993 models, replicating the original gasket’s fit, function, and durability. It provides a gas-tight seal between the exhaust manifold or heat exchanger and the cylinder head, restoring quiet, leak-free, and efficient exhaust performance.
Fits:
Porsche 964 C2 / C4 / Carrera RS 1989-94
Porsche 993 Carrera / Turbo 1995-98
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311119500
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
