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Exhaust Gaskets
By OE Match
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- 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
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Sold each.
This exhaust manifold gasket is a precision replacement part built to Porsche’s original specifications. Designed to seal the connection between the exhaust manifold (or heat exchanger) and the cylinder head, it replicates the exact dimensions, materials, and performance of the factory gasket for a perfect fit.
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2005 - 2008
Porsche 996 3.4L C2 / C4 1998 - 2001
Porsche 996 3.6L C2 / C4 / C4S 2002 - 2005
Porsche 997.1 Carrera 2005 - 2008 (M96.05 / M97.01)
Diagram ref no 3
This gasket ensures a gas-tight seal at one of the hottest points in the exhaust system, preventing leaks and maintaining optimal exhaust pressure. It also helps preserve engine efficiency, reduce noise, and prevent exhaust gases or heat from escaping into the engine bay.
Why replacement matters:
• Factory gaskets can deteriorate or warp over time due to extreme heat and pressure cycles
• A worn or damaged gasket may cause exhaust leaks, reduced performance, and loud exhaust noise
• Installing an OE Match replacement restores a secure seal, maintaining proper exhaust flow, back pressure, and long-term reliability.
Fits between the exhaust manifold or heat exchanger and the cylinder head.
Sold individually; two or more may be required depending on the engine configuration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99611110755
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- 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
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Fits:
Porsche 986 Boxster 1997-04
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2005-08
Porsche 996 3.4L C2 / C4 1998-01
Porsche 996 3.6L C2 / C4 / C4S 2002-05
Porsche 997 MKI Carrera 2005-08 (M96.05 / M97.01)
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99611110755
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
This gasket provides a tight, pressure-resistant seal between the exhaust manifold and the catalytic converter. Under high exhaust temperatures and pulsating exhaust flow, the gasket maintains integrity to prevent leaks, ensures correct back-pressure, and preserves exhaust gas routing as per factory specifications.
Sold each, 2 required per vehicle.
Fits:
Porsche 986 Boxster 2.7L 1999 - 2005
Porsche 986 Boxster S 3.2L 1999 - 2005
Diagram ref no 7
• It is supplied as a single seal; for full exhaust assembly maintenance usually two are required (one per side/exhaust bank) to guarantee symmetric sealing and effective exhaust performance.
• Position: Between the exhaust manifold and catalytic converter - forms the connection seal in the exhaust system.
• Function: Provides a pressure-tight, heat-resistant seal to prevent exhaust leaks, ensure correct exhaust routing, maintain back-pressure, and reduce risk of exhaust-gas leakage or noise.
Over time, high exhaust heat and repeated heating/cooling cycles cause exhaust gaskets to degrade. They may shrink, crack, or lose sealing pressure — which leads to exhaust leaks, rattling, increased emissions, back-pressure loss, poor performance or noisy exhaust. Replacing this gasket restores a secure, leak-free connection and helps maintain engine efficiency, emissions compliance, and exhaust system integrity.
When to replace:
• Audible exhaust leak or ticking / hissing noise at exhaust manifold / cat junction
• Visible soot or carbon deposits around the gasket area (sign of leakage)
• Reduced engine performance, rough idle or inconsistent exhaust tone
• After removing exhaust manifold, catalytic converter or exhaust down-pipe for maintenance or repair
• During a full exhaust system overhaul or gasket-replacement maintenance cycle
• When original gasket shows signs of age, heat damage, corrosion or physical deformation
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99611311300
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- 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
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
M8. EACH
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.
99908405202
The product you are viewing cross references to these numbers
OEMatch Exhaust Gaskets — Flow, Response, Refinement
Exhaust gaskets form essential seals within Porsche exhaust systems. OEMatch supplies a selection of exhaust gaskets for Porsche models to restore sealing between manifolds, headers, pipes and catalytic converters. Choosing the correct profile and material helps prevent leaks, reduce noise and protect nearby components from heat damage.
Available Types
- Manifold-to-downpipe flange gaskets
- Header and collector gaskets
- Catalytic converter and connector gaskets
- Ring and multi-layer steel (MLS) exhaust seals
Understanding OEMatch Exhaust Gaskets
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original exhaust gaskets.
OE (Original Equipment) refers to parts matching original specifications for the exhaust gaskets and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM exhaust gaskets engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Exhaust gaskets create airtight seals at joints and flanges to control gas flow and maintain correct back pressure. Materials range from composite fibres and graphite to metal-reinforced and multi-layer steel constructions chosen for temperature resistance and corrosion durability. Correct sealing supports sensor operation, emissions control and engine efficiency while limiting exhaust noise and vibration.
Benefits Include
- Tight sealing to prevent exhaust leaks and maintain back pressure
- Reduced exhaust noise and vibration
- Protection of nearby components from heat and corrosive gases
Why Exhaust Gaskets Wear and Fail
- Repeated thermal expansion and contraction leading to cracking or deformation
- Corrosion from moisture and road salt attacking metal layers
- Vibration and joint movement causing material fatigue or loss of compression
- Incorrect installation or uneven flange contact causing leaks
The Importance of Replacing with OEMatch Exhaust Gaskets
Replacing worn or damaged gaskets restores proper exhaust sealing for Porsche models and helps retain engine performance, emissions control and component life. Many owners search for genuine or OEM exhaust gaskets; these are direct-fit alternatives designed to match the original form, fit and function. Selecting the correct gasket type for the exhaust joint reduces the risk of recurring leaks and downstream damage to manifolds, sensors and catalytic converters.
Advantages
- A choice of materials and profiles matched to common Porsche flange types
- Options suited to restoration, routine maintenance or higher-temperature applications
- Clear identification by application to help confirm fit for model and engine
