Gaskets & Sets
- 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 Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016

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.
Fits:
Porsche 986 2.5L 150KW / 204HP
Engine Type M96.20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9620
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99

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.
Fits:
Porsche 986 2.7L 2000-02 162KW / 220HP
Engine Type M96.22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9622
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.7L 1999-02

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.
Fits:
Porsche 986 2.7L 2000-02 162KW / 220HP
Engine Type M96.22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9623
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.7L 2003-04
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.
Fits:
Porsche 986 S 3.2L 2000-02 185KW / 252HP
M96.21
Complete engine gasket set for Porsche 986 Boxster S 3.2L (2000–2002, M96.21 engine). This high-quality OE Match kit includes all major gaskets, seals, and O-rings needed for a full rebuild—restoring proper sealing, performance, and engine reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9621
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02

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.
Fits:
Porsche 986 S 3.2L 2003>> 191KW / 260HP M96.24
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9624
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 2003-04

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.
Fits:
Porsche 987 2.7L 2005>> 176KW / 239HP
Engine Type: M96.25
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9625
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Cayman 2.7L 987C 2006-08

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.
Fits:
Porsche 987 2.7L 2005>> 180KW / 245HP
Engine Type: M97.20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9720
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Cayman 2.7L 987C 2006-08

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.
Fits:
Porsche 987 3.2L 2005>> 206KW / 280HP
Engine Type: M96.26
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9626
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
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.
Fits:
Porsche 987 S 3.4L 2005>> 217KW / 295HP
Engine Type: M97.21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9721
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
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.
Fits:
Porsche 987 S 3.4L 2005>> 217KW / 295HP
Engine Type: M97.22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
999100M9721
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08

Fits:
Porsche 986 Boxster 2.5L
Please note this kit does not include Engine Gasket - Cylinder 1-3 or 4-6. these must be purchased separately.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98610090500
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99


Fits:
Porsche 986 Boxster 2.5L 1997-2004
Porsche 996 3.4L
Please note this kit does not include Engine Gasket - Cylinder 1-3 or 4-6. these must be purchased separately.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98610090500
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01

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
Related, superseded, cross reference or alternative numbers for comparison.
99610420104
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- 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 4 3.6L 2005-08
- Porsche Cayman S 3.4L 987C 2005-08
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
Related, superseded, cross reference or alternative numbers for comparison.
99610420104
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- 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 4 3.6L 2005-08
- Porsche Cayman S 3.4L 987C 2005-08


Fits:
Porsche 986 Boxster 2.5L / 2.7L CC 1997-02 (M96.20/22)
This product supersedes Porsche's old part numbers:
- 99610417004 (1-3 Cyl.) / 99610416900 (4-6 Cyl.)
- 99610417005 (1-3 Cyl.) / 99610416901 (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.
9961041
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02

Fits:
Porsche 986 Boxster 2.5L / 2.7L CC 1997-02 (M96.20/22)
This product supersedes Porsche's old part numbers:
- 99610417004 (1-3 Cyl.) / 99610416900 (4-6 Cyl.)
- 99610417005 (1-3 Cyl.) / 99610416901 (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.
9961041
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
Engine Gaskets & Gasket Sets – Precision Sealing for Porsche Engines
Engine gaskets are vital components that ensure your Porsche’s engine operates efficiently and leak-free. Positioned between key engine surfaces such as the cylinder head, intake manifold, and oil pan, gaskets maintain a perfect seal against high temperatures, pressures, and fluids.
At Design911, we offer a comprehensive range of engine gaskets, seals, and complete gasket kits for Porsche models of every generation. Each gasket is crafted from high-quality composite, metal, or elastomer materials to withstand the extreme conditions of high-performance engines — ensuring optimal sealing, reduced oil and coolant leaks, and consistent compression.
Whether you’re rebuilding a classic 911 flat-six or servicing a modern turbocharged Porsche engine, our manufacturer-quality gaskets and complete kits guarantee reliability, performance, and peace of mind.
What Do Engine Gaskets and Gasket Sets Do?
Gaskets play a critical role in ensuring that various engine systems — combustion, lubrication, and cooling — remain properly sealed.
Core Functions:
- Prevent
leaks of oil, coolant, air, and combustion gases.
- Maintain
compression between the engine block and cylinder head.
- Ensure
efficient combustion and proper engine pressure balance.
- Protect internal components from cross-contamination of fluids.
A properly sealed engine not only improves performance and efficiency but also prevents costly long-term damage.
Why Do Gaskets Fail?
Despite their durability, gaskets naturally degrade over time due to extreme heat cycles, pressure variations, and material fatigue.
Common Causes of Gasket Failure Include:
- Overheating,
causing warping or breakdown of the gasket material.
- Improper
installation or torqueing during assembly.
- Aging
materials that harden or crack with use.
- Chemical
degradation from oil or coolant exposure.
- Uneven pressure or engine vibration, leading to micro-leaks.
Typical symptoms of gasket failure include oil or coolant leaks, reduced compression, overheating, or visible residue at gasket joints.
Why Replace with Precision-Engineered Gaskets and Kits?
Replacing worn or leaking gaskets is essential to maintain proper engine compression, prevent contamination, and restore overall reliability. Our direct-fit gasket sets and kits are designed to meet or exceed Porsche engineering standards, providing complete sealing solutions for rebuilds and maintenance.
Key Benefits:
- Restores proper sealing and compression integrity.
- Prevents oil and coolant leaks for cleaner performance.
- Enhances efficiency and reliability under load.
- Manufactured from high-grade, heat- and pressure-resistant materials.
- Available
as individual gaskets or complete kits for full rebuilds.
- Direct-fit compatibility for a wide range of Porsche models.
Our gasket sets are ideal for engine rebuilds, overhauls, and preventive maintenance, ensuring long-term dependability and peak performance.
Highlights:
- Complete Porsche engine gasket kits and individual components.
- Precision-engineered for exact sealing performance.
- Constructed from advanced composite, metal, and elastomer materials.
- Resistant to heat, pressure, and chemical exposure.
- Suitable for classic air-cooled and modern water-cooled engines.
- Ensures leak-free operation and lasting reliability.