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Porsche // 964 (911) (1989-1994) // 964 (911) C4 1989-93
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- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
The Genuine Porsche Exhaust Gasket 477253115E is a replacement sealing component designed for the connection between the exhaust manifold and downpipe on compatible left-hand-drive (LHD) Porsche applications.
Fits:
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
Diagram Ref No 11
This gasket creates a gas-tight seal at an important exhaust-system joint, preventing hot exhaust gases from escaping before they continue through the downpipe and the rest of the exhaust system.
Constant exposure to extreme temperatures, exhaust gases and repeated heating and cooling cycles can cause an old gasket to deteriorate, compress or burn through. Replacing a failed gasket helps restore a properly sealed exhaust connection, reduce unwanted exhaust noise and prevent hot gases leaking around the manifold-to-downpipe joint.
What This Product Does:
The exhaust gasket sits between the mating surfaces of the exhaust manifold and downpipe, creating a seal when the components are secured together.
Exhaust gases leave the engine at high temperature and pressure. These gases must remain contained within the exhaust system as they travel away from the engine.
The gasket helps:
- Create a gas-tight manifold-to-downpipe connection
- Prevent exhaust gases escaping through the joint
- Reduce unwanted exhaust noise
- Maintain proper exhaust-system integrity
- Protect surrounding components from escaping hot gases
- Prevent exhaust fumes leaking from the connection
- Maintain a secure seal despite repeated thermal expansion and contraction
Although relatively small, the gasket plays an important role in keeping the exhaust system correctly sealed.
Symptoms Of Wear Or Failure:
A deteriorated manifold-to-downpipe gasket can allow exhaust gases to escape through the connection.
Common symptoms may include:
- Ticking, tapping or blowing noise from the exhaust joint
- Increased exhaust noise
- Hissing or puffing sounds during acceleration
- Exhaust fumes or odour around the engine or underside of the vehicle
- Black soot deposits around the manifold-to-downpipe connection
- Visible signs of exhaust gas leakage
- Reduced exhaust-system sealing
- Noise that becomes more noticeable under load
- Heat damage or discolouration around the leaking joint
- Engine or emissions-related faults where applicable
A small leak may initially only be noticeable when the engine is cold or under acceleration.
Why Replacement Matters:
A leaking exhaust gasket should not be ignored.
Replacing a worn or damaged manifold-to-downpipe gasket helps:
- Restore a properly sealed exhaust connection
- Prevent hot exhaust gases escaping from the joint
- Reduce blowing, ticking and hissing noises
- Prevent soot accumulation around the connection
- Protect nearby components from concentrated exhaust heat
- Reduce the possibility of exhaust fumes entering areas where they should not
- Maintain correct exhaust-system operationRestore a cleaner and quieter exhaust system
A deteriorated gasket can progressively worsen as hot gases erode the sealing area.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477253115E
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
Fits:
Porsche 964 C2 / C4 1989-93
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96411119205
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