gasket Genuine Porsche part 99610420300

Engine head gasket. Cylinder 1-3 or 4-6.
1 per engine.



Fits:
Porsche 996 C2 / C4 3.4L 1998-01 (M96.01/02/04)

This product supersedes Porsche's old part numbers:
- 99610427005 (1-3 Cyl.) / 99610426900 (4-6 Cyl.)

Click 'Zoom in' for large parts diagram.
Diagram ref no 24.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9961042

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Engine head gasket. Fits: cylinder 1-3 or 4-6.
2 per engine.



Fits:
Porsche 987 Boxster S 3.4L 2006-08 (M97.21)
Porsche 987 Boxster S 3.4L RS SPYDER 2008 (M97.22)
Porsche 987C Cayman S 3.4L 2006-08 (M97.21)
Porsche 996 3.6L C2 / C4 / C4S 2002-05 (M96.03)
Porsche 997 C2 / C4 3.6L Coupe/Cabrio 2005-08 (M96.05)

This product supersedes Porsche's old part numbers:
- 99610420102

Click 'Zoom in' for large parts diagram.
Diagram ref no 19

Related reference numbers
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99610420104

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Cylinder head cover plug.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987 Boxster 2005 - 2008
Porsche 987C Cayman 2005 - 2008
Porsche 996 C2 / C4 / C4S 1997 - 2005
Porsche 997 Carrera 2005 - 2008

Diagram ref no 28.

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Related, superseded, cross reference or alternative numbers for comparison.

99610421555

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Cylinder Head Cover Plug.



Fits:
Porsche 986 Boxster 2.7L / 3.2L 2003-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 2002-05
Porsche 997 Carrera 2005-08


Click 'zoom in' for large parts diagram
Diagram ref no 29.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610421602

The product you are viewing cross references to these numbers

Cylinder head cover gasket.



Fits:
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 2002-05
Porsche 997 Carrera 2005-08

Click 'zoom in' for large parts diagram
Diagram ref no 27.

Related reference numbers
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99610420300

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Engine Gasket Set.
Engine re-build complete gasket set, INCLUDING head gaskets.
This kit is made with very high quality gaskets, and are complete gasket sets to complete the job.

The OE Match Engine Gasket Set is a premium-quality replacement sealing kit designed to restore the integrity of compatible Porsche engines during repairs, rebuilds or major servicing. Manufactured to OE specifications for fit, material quality and durability, this comprehensive gasket set provides the essential seals required to prevent oil, coolant and compression leaks while maintaining optimum engine performance and reliability.

Fits:

• Porsche 996 C2 3.4L 1997-08/01
• Porsche 996 C4 3.4L 1997-08/01 

Manufactured using premium-quality gasket materials selected for their resistance to heat, pressure, engine oil, coolant and fuel, the components are engineered to withstand the demanding operating conditions of modern and classic Porsche engines. Precision-cut for accurate OE-style fitment, the gasket set helps ensure reliable sealing across multiple engine assemblies, making it ideal for professional engine rebuilds, overhauls and preventative maintenance.

What This Product Does:

• Provides reliable sealing between critical engine components.
• Prevents oil, coolant and compression leaks.
• Maintains correct engine compression and efficiency.
• Supports proper lubrication and cooling system operation.
• Protects the engine from contamination and fluid loss.
• Restores factory sealing performance during engine repairs.
• Includes essential gaskets for comprehensive engine servicing.
• Forms an integral part of the engine sealing system.

Symptoms Of Wear Or Failure:

• Engine oil leaks.
• Coolant leaks.
• Overheating caused by coolant loss.
• White exhaust smoke indicating coolant entering the combustion chamber.
• Low engine compression.
• Mixing of oil and coolant.
• Visible gasket deterioration during servicing.
• Loss of engine performance.
• Increased oil consumption.
• Persistent fluid leaks after component removal or rebuilds.

Why Replacement Matters:

• Engine gaskets operate under extreme temperatures, high pressures and continual thermal expansion and contraction. Over time, gasket materials can harden, compress or deteriorate, reducing their ability to maintain an effective seal between engine components.
• Failing gaskets can allow oil, coolant or combustion gases to escape, resulting in reduced engine performance, overheating, fluid contamination and accelerated internal engine wear. During any engine rebuild or major repair, replacing all relevant gaskets is essential to ensure long-term reliability and avoid repeat labour.
• Replacing worn gaskets with the OE Match Engine Gasket Set restores the engine's sealing integrity and helps ensure reliable operation throughout the entire engine assembly. Manufactured to OE standards using premium sealing materials, this complete gasket set provides factory-style fitment, long-lasting durability and dependable performance, making it the ideal solution for Porsche engine rebuilds, servicing and restoration projects.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

999100M9601

The product you are viewing cross references to these numbers

Engine Gasket Set.
Engine re-build complete gasket set, INCLUDING head gaskets This kit is made with very high-quality gaskets, and are complete gasket sets to complete the job.

The OE Match Engine Gasket Set is a premium-quality replacement sealing kit designed to restore the sealing integrity of compatible Porsche engines during repairs, rebuilds and major servicing. Manufactured to OE specifications for fit, material quality and durability, this comprehensive gasket set contains the essential gaskets and seals required to prevent oil, coolant and compression leaks while maintaining optimum engine performance and long-term reliability.

Fits:

• Porsche 996 C2 3.6L 09/01-2005
• Porsche 996 C4 3.6L 09/01-2005
• Porsche 996 C4S 3.6L 09/01-2005  

Manufactured from premium-quality composite gasket materials, high-temperature elastomers and precision-engineered sealing components, the kit is designed to withstand extreme engine temperatures, high combustion pressures and continual exposure to engine oil and coolant. Precision-cut for direct OE-style installation, each gasket provides an accurate fit to ensure dependable sealing across critical engine assemblies, making the kit ideal for professional engine rebuilds and preventative maintenance.  

What This Product Does:

• Provides reliable sealing between critical engine components.
• Prevents oil, coolant and combustion gas leaks.
• Maintains correct engine compression and efficiency.
• Supports proper lubrication and cooling system operation.
• Protects the engine from contamination and fluid loss.
• Restores factory sealing performance during engine repairs.
• Supplies essential gaskets for comprehensive engine servicing.
• Forms an integral part of the engine sealing system.

Symptoms Of Wear Or Failure:

• Engine oil leaks.Coolant leaks.
• Loss of engine compression.
• Engine overheating caused by coolant loss.
• White exhaust smoke indicating coolant entering the combustion chamber.
• Oil and coolant contamination.
• Reduced engine performance.
• Increased engine oil consumption.
• Visible gasket deterioration during engine servicing.
• Persistent fluid leaks following engine disassembly.

Why Replacement Matters:

• Engine gaskets are subjected to constant thermal cycling, high internal pressures and prolonged exposure to oil, coolant and combustion gases. Over time, gasket materials naturally compress, harden or deteriorate, reducing their ability to maintain an effective seal between engine components.
• Failing gaskets can lead to fluid leaks, loss of compression, overheating and contamination of vital engine systems. Continued operation with damaged gaskets can accelerate engine wear and result in expensive repairs. During any major engine repair or rebuild, replacing all sealing components is essential to ensure reliable long-term performance and avoid repeat labour.
• Replacing worn gaskets with the OE Match Engine Gasket Set restores the engine's sealing integrity and helps maintain reliable operation throughout the entire engine assembly. Manufactured to OE standards using premium sealing materials, the 999100M9603 kit provides factory-style fitment, long-lasting durability and dependable performance, making it the ideal solution for Porsche engine rebuilds, servicing and restoration projects.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

999100M9603

The product you are viewing cross references to these numbers

Engine Gasket Set.
Engine re-build complete gasket set, INCLUDING head gaskets This kit is made with very high-quality gaskets, and are complete gasket sets to complete the job.

The OE Match Engine Gasket Set is a premium-quality replacement sealing kit designed to restore the sealing integrity of compatible Porsche engines during repairs, rebuilds and major servicing. Manufactured to OE specifications for fit, material quality and durability, this comprehensive gasket set contains the essential gaskets and seals required to prevent oil, coolant and compression leaks while maintaining optimum engine performance and long-term reliability.

Fits:

• Porsche 997 MK1 Carrera 2 3.6L 2005-08
• Porsche 997 MK1 Carrera 4 3.6L 2005-08  

Manufactured from premium-quality composite gasket materials, high-temperature elastomers and precision-engineered sealing components, the kit is designed to withstand extreme engine temperatures, high combustion pressures and continual exposure to engine oil and coolant. Precision-cut for direct OE-style installation, each gasket provides an accurate fit to ensure dependable sealing across critical engine assemblies, making the kit ideal for professional engine rebuilds and preventative maintenance.  

What This Product Does:

• Provides reliable sealing between critical engine components.
• Prevents oil, coolant and combustion gas leaks.
• Maintains correct engine compression and efficiency.
• Supports proper lubrication and cooling system operation.
• Protects the engine from contamination and fluid loss.
• Restores factory sealing performance during engine repairs.
• Supplies essential gaskets for comprehensive engine servicing.
• Forms an integral part of the engine sealing system.

Symptoms Of Wear Or Failure:

• Engine oil leaks.
• Coolant leaks.
• Loss of engine compression.
• Engine overheating caused by coolant loss.
• White exhaust smoke indicating coolant entering the combustion chamber.
• Oil and coolant contamination.
• Reduced engine performance.
• Increased engine oil consumption.
• Visible gasket deterioration during engine servicing.
• Persistent fluid leaks following engine disassembly.

Why Replacement Matters:

• Engine gaskets are subjected to constant thermal cycling, high internal pressures and prolonged exposure to oil, coolant and combustion gases. Over time, gasket materials naturally compress, harden or deteriorate, reducing their ability to maintain an effective seal between engine components.
• Failing gaskets can lead to fluid leaks, loss of compression, overheating and contamination of vital engine systems. Continued operation with damaged gaskets can accelerate engine wear and result in expensive repairs. During any major engine repair or rebuild, replacing all sealing components is essential to ensure reliable long-term performance and avoid repeat labour.
• Replacing worn gaskets with the OE Match Engine Gasket Set restores the engine's sealing integrity and helps maintain reliable operation throughout the entire engine assembly. Manufactured to OE standards using premium sealing materials, the 999100M9605 kit provides factory-style fitment, long-lasting durability and dependable performance, making it the ideal solution for Porsche engine rebuilds, servicing and restoration projects.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

999100M9605

The product you are viewing cross references to these numbers

OE Match Complete Engine Gasket Set with Head Gaskets for Porsche 987 Boxster S & Cayman S 3.4ltr M97.21 (217kW / 295HP)

Restore your Porsche engine to factory performance with this OE Match Complete Engine Gasket Set, specifically developed for the Porsche 987 Boxster S and Cayman S 3.4ltr fitted with the M97.21 engine producing 217kW (295HP).

Fits:

• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Cayman S 3.4L 987C 2005-08

Designed for professional engine rebuilding and major engine repairs, this comprehensive gasket kit contains the essential seals and gaskets required to completely rebuild your engine, including both cylinder head gaskets. Whether you're carrying out a full engine overhaul, replacing leaking gaskets or rebuilding a high-mileage M97 engine, this complete gasket set provides the OE-quality sealing components required for a reliable, long-lasting repair.

Manufactured to original equipment specifications using premium sealing materials, every gasket is precision engineered for accurate fitment, exceptional sealing performance and maximum durability under the demanding operating conditions of the Porsche flat-six engine.

What Does a Complete Engine Gasket Set Do?

A complete engine gasket set provides all the critical sealing components required when rebuilding or overhauling an engine.

Its primary functions are to:

• Seal the combustion chambers.
• Maintain correct engine compression.
• Prevent oil leaks.
• Prevent coolant leaks.
• Keep oil and coolant passages completely separate.
• Maintain correct internal engine pressures.
• Restore factory sealing performance following engine disassembly.

Replacing every gasket during an engine rebuild ensures every sealing surface is renewed, reducing the risk of future leaks and improving long-term engine reliability.

Why Replace the Complete Gasket Set?

Once an engine has been dismantled, the original gaskets become permanently compressed and should never be reused. Installing a complete gasket set guarantees every sealing component is replaced at the same time, providing the highest standard of engine rebuild.

A complete gasket set is recommended when carrying out:

• Complete engine rebuilds.
• Cylinder head replacement.
• Head gasket repairs.
• Engine reconditioning.
• Major oil leak repairs.
• Coolant leak repairs.
• High-mileage engine refurbishment.
• Performance engine builds.

Replacing only individual gaskets can leave ageing seals elsewhere in the engine, increasing the likelihood of future leaks.

Why Do Engine Gaskets Fail?

Engine gaskets operate in extremely demanding conditions and naturally deteriorate over time.

Common causes of failure include:

• Continuous heat cycling.
• High engine temperatures.
• Engine overheating.
• Oil contamination.
• Coolant contamination.
• High mileage.
• Material ageing.
• Incorrect installation.

Renewing all gaskets during an engine rebuild restores the engine's sealing integrity and helps maximise service life.

When Should a Complete Engine Gasket Set Be Installed?

A complete engine gasket set should always be fitted whenever:

• Performing a complete engine rebuild.
• Removing the cylinder heads.
• Replacing head gaskets.
• Reconditioning the engine.
• Repairing significant oil leaks.
• Repairing coolant leaks.
• Rebuilding a high-mileage engine.
• Carrying out preventative maintenance while the engine is dismantled.

Replacing every gasket during assembly helps eliminate future leaks, reduces repeat labour and ensures a professional-quality rebuild.

OE Match Quality You Can Trust

This OE Match Complete Engine Gasket Set features:

• Complete engine rebuild gasket kit.
• Includes both cylinder head gaskets.
• Manufactured to OE specifications.
• Premium heat-resistant sealing materials.
• Excellent resistance to engine oil and coolant.
• Precision-engineered fitment.
• Direct replacement components.
• Suitable for professional and enthusiast engine rebuilding.
• Long-lasting sealing performance.       

Related reference numbers
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999100M9721

The product you are viewing cross references to these numbers