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Heat Exchangers
By OE Match
- 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Related, superseded, cross reference or alternative numbers for comparison.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:
- 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) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
This OE Match exhaust seal ring is a replacement gasket ring used between the heat exchanger and cylinder head on Porsche 964 Turbo models. It is designed to match the original sealing function and provide a secure, gas-tight connection in the exhaust system
Sold individually, 3 required per side / 6 required per vehicle
Fits:
Porsche 964 Turbo 1991 - 1993
Diagram ref no 2
The seal ring creates a tight seal at the heat exchanger connection, helping prevent exhaust gases from escaping before they enter the rest of the exhaust system. A correct seal supports proper exhaust flow, reduces unwanted noise, and helps maintain engine performance.
Functions
• Seals the connection between the heat exchanger and cylinder head
• Helps prevent exhaust gas leaks
• Supports correct exhaust flow and back pressure
• Reduces ticking, blowing, or leak-related exhaust noise
• Helps maintain turbocharged engine efficiency
• Provides an OE Match replacement for the original exhaust seal ring
• Suitable for heat exchanger removal, replacement, or exhaust system service
Exhaust seal rings are exposed to extreme heat, pressure, vibration, and corrosion. Over time, the original ring can flatten, crack, burn through, or lose its sealing ability. A failed seal ring can cause exhaust leaks, ticking noises, fumes, poor sealing at the heat exchanger, and reduced exhaust system efficiency. Replacing the seal ring helps restore a tight, reliable exhaust connection.
When to replace
• The heat exchangers have been removed or replaced
• There is an exhaust leak at the heat exchanger connection
• A ticking or blowing noise is heard from the exhaust/head area
• The old seal ring is crushed, cracked, burnt, corroded, or missing
• Exhaust fumes or soot marks are visible around the joint
• Engine or turbo exhaust work is being carried out
• As preventative replacement during exhaust system reassembly
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011122300
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
Fits:
Porsche 964 C2 / C4 1989-94
Porsche 964 Carrera RS 3.6L 1992
Porsche 964 C2 Tiptronic 1990-94
Click 'Zoom in' for large parts diagram.
Diagram ref no 9.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96421133900
The product you are viewing cross references to these numbers
OEMatch Heat Exchangers — Fit, Function, Confidence
Heat exchangers recover heat from exhaust gases to supply cabin heating and assist thermal management. For Porsche models they help maintain warm-up behaviour and exhaust routing while limiting fumes reaching the cabin. OEMatch supplies replacements selected for these applications.
Available Types
- Exhaust-to-air heat exchangers in stainless or aluminised steel for air-cooled engines
- Heater cores and heater boxes for cabin heating in classic and modern Porsche models
Understanding OEMatch Heat Exchangers
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original heat exchangers.
OE (Original Equipment) refers to parts matching original specifications for the heat exchangers and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM heat exchangers engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. Heat exchangers capture waste heat from exhaust gases and direct it to the heating system or auxiliary circuits; they help preserve engine temperature, reduce warm-up time and support safe cabin ventilation when intact.
Benefits Include
- Restores cabin heating and occupant comfort in air-cooled applications
- Reduces the risk of exhaust gases entering the vehicle cabin
- Improves exhaust routing and thermal efficiency during warm-up
Why Heat Exchangers Wear and Fail
- Corrosion and perforation from condensation and road salt
- Cracks or fatigue from repeated thermal cycling or impact
- Carbon and soot buildup restricting heat transfer and flow
The Importance of Replacing with OEMatch Heat Exchangers
Replacing a worn or leaking heat exchanger preserves cabin heating, prevents exhaust contamination and helps maintain correct exhaust back pressure for engine performance. OEMatch catalogues thousands of Porsche part numbers and cross-references to support repairs and restorations; products are selected to suit classic and modern Porsche applications.
Advantages
- Corrosion-resistant materials such as stainless or aluminised steel
- Formed components that match expected mounting and routing for Porsche models
- Suitable for restoration, maintenance and model-specific repairs
