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ENGINE GASKET SET Porsche 987 S 3.4L 2005>> 217KW / 295HP M97.21 ❭ 999100M9721
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
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
Related, superseded, cross reference or alternative numbers for comparison.
999100M9721
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
Price is for each.

Fits:
Porsche 996 Turbo
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99611121770
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05

Fits:
Porsche 987 Boxster 2.7L / 3.4L 2006-08
Porsche 987C Cayman 2.7L / 3.4L 2006-08
Porsche 997 C2 / C4 / C2S / C4S 2005-08 Coupe / Cabrio
This product supersedes Porsche's old part numbers:
- 99711024701
Click 'Zoom in' for large parts diagram.
Diagram ref no 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99711024702
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
2 per engine.

Fits:
Porsche 996 Turbo / GT2 2005-08
Porsche 996 GT3 2000-05
Porsche 997 MKI Turbo / GT2 2007-09 (M97.70)
Porsche 997 MKII Turbo 2010-12 (M97.70)
Porsche 997 MKII GT2
Porsche 997 MKII GT2RS
Porsche 997 GT3 2007-11 (M97.76)
This product supersedes Porsche's old part numbers:
- 99610417071
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
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