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Porsche > Cayman 987C / 981C (2005-2016) > Engine Rebuild Parts > Gaskets & Sets >

ENGINE GASKET SET Porsche 987 S 3.4L 2005>> 217KW / 295HP M97.21  ❭  999100M9721

ENGINE GASKET SET Porsche 987 S 3.4L 2005>> 217KW / 295HP M97.21 - 99610420104, 99610124151, 99610124251, 99970755440, 99710670900, 99710634000, 99610632650, 99610632651 - M97.21/22Set
1
Related to Gaskets & Sets for Cayman 987C / 981C (2005-2016)
999100M9721
Product Information
Product Information

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
99610420104
99610124151
99610124251
99970755440
99710670900
99710634000
99610632650
99610632651

The product you are viewing cross references to these numbers
Related products
Engine head gasket. Porsche Boxster 986 2.7L / Boxster 987 2.7L / Cayman 987C 2.7L - 99610417010, 99610417007, 808.841 - 99610417010
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Engine head gasket. Porsche Boxster 986 2.7L / Boxster 987 2.7L / Cayman 987C 2.7L
Special Order item
99610417010
Product Information
Product Information
Engine head gasket. Fits: Cylinder 1-3 or 4-6.
2 per engine.

porsche

Fits:
Porsche 986 Boxster 2.7L 2003-04 (M96.23)
Porsche 987 Boxster 2.7L 2005-08 (M96.25)
Porsche 987C Cayman 2.7L 2007-08 (M97.20)

This product supersedes Porsche's old part numbers:
- 99610417007

Diagram ref no 24.

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Related, superseded, cross reference or alternative numbers for comparison.

99610417010
99610417010
99610417007
808.841

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Engine head gasket. Porsche Boxster / Cayman / 996 / 997 - 99610420104, 99610420102, 808.293
2
Engine head gasket. Porsche Boxster / Cayman / 996 / 997
Special Order item
99610420104
Product Information
Product Information
Engine head gasket. Fits: cylinder 1-3 or 4-6.
2 per engine.

porsche

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
99610420104
99610420102
808.293

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Rear Main Seal - Crankshaft Oil Seal (85x105x11) - for Porsche 986 / 987 / 981 / 718 / 996 / 997 / 991 / 992 / 955 / 958 / 970 / 95B-1 - 99911347640, 99911349040, 99911349041, 94810121202, 99710121200, 99710121201, 0PB105249 - 81-34819-00
3
Rear Main Seal - Crankshaft Oil Seal (85x105x11) - for Porsche 986 / 987 / 981 / 718 / 996 / 997 / 991 / 992 / 955 / 958 / 970 / 95B-1
0PB105249/1
Product Information
Product Information
Rear main seal (crankshaft oil seal) - 85 x 105 x 11. 

Fits:
Porsche 986 Boxster 2.5L 1997-99
Porsche 986 Boxster 2.7L 2000-04
Porsche 986 Boxster S 3.2L 2000-04

Porsche 987-1 Boxster 2.7L 2005-08
Porsche 987-1 Boxster S 3.4L 2005-08

Porsche 987-1 Cayman 2.7L 2005-08
Porsche 987-1 Cayman S 3.4L 2005-08

Porsche 987-2 Boxster 2.9L 2009-12
Porsche 987-2 Boxster S 3.4L 2009-12
Porsche 987-2 Boxster Spyder 3.4L 2011-12

Porsche 987-2 Cayman 2.9L 2009-12
Porsche 987-2 Cayman S 3.4L 2009-12
Porsche 987-2 Cayman R 3.4L 2012

Porsche 981 Boxster 2.7L 2012-16
Porsche 981 Boxster S 3.4L 2012-16
Porsche 981 Boxster GTS 3.4L 2015-16
Porsche 981 Boxster Spyder 3.8L 2016

Porsche 981 Cayman 2.7L 2014-16
Porsche 981 Cayman S 3.4L 2014-16
Porsche 981 Cayman GTS 3.4L 2014-16
Porsche 981 Cayman GT4 3.8L 2016

Porsche 718 (982) Boxster 2.0L 2017>>
Porsche 718 (982) Boxster T 2.0L 2020>> 
Porsche 718 (982) Boxster S 2.5L 2017>>
Porsche 718 (982) Boxster GTS 2.5L 2018-19
Porsche 718 (982) Boxster GTS 4.0L 2019>>
Porsche 718 (982) Boxster Spyder 4.0L 2019>> - Excludes RS

Porsche 718 (982) Cayman 2.0L 2017>>
Porsche 718 (982) Cayman T 2.0L 2020>> 
Porsche 718 (982) Cayman S 2.5L 2017>>
Porsche 718 (982) Cayman GTS 2.5L 2018-19
Porsche 718 (982) Cayman GTS 4.0L 2019>> 
Porsche 718 (982) Cayman GT4 4.0L 2019>> - Excludes RS   

Porsche 996-1 Carrera 3.4L 1998-01
Porsche 996-1 Carrera 4 3.4L 1999-01

Porsche 996-2 Carrera 3.6L 2002-04
Porsche 996-2 Carrera 4 3.6L 2002-04
Porsche 996-2 Carrera 4S 3.6L 2002-05
Porsche 996-2 Targa 3.6L 2002-04

Porsche 997-1 Carrera 3.6L 2005-08
Porsche 997-1 Carrera 4 3.6L 2006-08
Porsche 997-1 Carrera S 3.8L 2005-08
Porsche 997-1 Carrera 4S 3.8L 2006-08
Porsche 997-1 Targa 4 3.6L 2007-08
Porsche 997-1 Targa 4S 3.8L 2007-08

Porsche 997-2 Carrera 3.6L 2009-12
Porsche 997-2 Carrera 4 3.6L 2009-12
Porsche 997-2 Carrera S 3.8L 2009-12
Porsche 997-2 Carrera GTS 3.8L 2011-12
Porsche 997-2 Carrera 4 GTS 3.8L 2011-12
Porsche 997-2 Carrera 4S 3.8L 2009-12
Porsche 997-2 Targa 4 3.6L 2009-12
Porsche 997-2 Targa 4S 3.8L 2009-12

Porsche 997-2 Turbo / S 3.8L 2010-13

Porsche 991-1 Carrera 3.4L 2012-16
Porsche 991-1 Carrera 4 3.4L 2012-16
Porsche 991-1 Carrera S 3.8L 2012-16
Porsche 991-1 Carrera 4S 3.8L 2012-16
Porsche 991-1 Carrera GTS 3.8L 2015-16
Porsche 991-1 Carrera 4 GTS 3.8L 2016
Porsche 991-1 Targa 4 3.4L 2015-16
Porsche 991-1 Targa 4S 3.8L 2015-16
Porsche 991-1 Targa 4 GTS 3.8L 2015-16

Porsche 991-2 Carrera 3.0L 2017-19
Porsche 991-2 Carrera 4 3.0L 2017-19
Porsche 991-2 Carrera S 3.0L 2017-19
Porsche 991-2 Carrera 4S 3.0L 2017-19
Porsche 991-2 Carrera GTS 3.0L 2017-19
Porsche 991-2 Carrera 4 GTS 3.0L 2017-19
Porsche 991-2 Targa 3.0L 2017-19
Porsche 991-2 Targa 4 3.0L 2017-19
Porsche 991-2 Targa 4 GTS 3.0L 2017-19 

Porsche 991-1 Turbo 3.8L 2014-16
Porsche 991-2 Turbo 3.8L 2017-20

Porsche 992-1 Carrera 3.0L 2019-24
Porsche 992-1 Carrera T 3.0L 2023-24
Porsche 992-1 Carrera S 3.0L 2019-24
Porsche 992-1 Carrera GTS 3.0L 2022-24
Porsche 992-1 Carrera 4 3.0L 2019-24
Porsche 992-1 Carrera 4S 3.0L 2019-24
Porsche 992-1 Carrera 4 GTS 3.0L 2022-24
Porsche 992-1 Targa 4 3.0L 2019-24
Porsche 992-1 Targa 4S 3.0L 2019-24
Porsche 992-1 Targa 4 GTS 3.0L 2022-24

Porsche 992-1 Turbo / S 3.7L 2020>> 

Porsche 992-2 Carrera 3.0L 2024>>
Porsche 992-2 Carrera T 3.0L 2024>>
Porsche 992-2 Carrera S 3.0L 2024>>
Porsche 992-2 Carrera GTS T-Hybrid 3.6L 2024>>
Porsche 992-2 Carrera 4 GTS T-Hybrid 3.6L 2024>> 

Porsche 955 Cayenne S 4.5L V8 2003-06
Porsche 955 Cayenne Turbo 4.5L V8 2003-06

Porsche 957 Cayenne S 4.8L V8 2007-10
Porsche 957 Cayenne GTS 4.8L V8 2008-10
Porsche 957 Cayenne Turbo 4.8L V8 2007-10

Porsche 958-1 Cayenne S 4.8L V8 2011-14
Porsche 958-1 Cayenne GTS 4.8L V8 2011-14
Porsche 958-1 Cayenne Turbo 4.8L V8 2011-14
Porsche 958-1 Cayenne Turbo S 4.8L V8 2011-14

Porsche 958-2 Cayenne S 3.6L V6 2015-18
Porsche 958-2 Cayenne GTS 3.6L V6 2015-18
Porsche 958-2 Cayenne Turbo 4.8L V8 2015-18
Porsche 958-2 Cayenne Turbo S 4.8L V8 2015-18

Porsche 970-1 Panamera 3.6L V6 2010-13
Porsche 970-1 Panamera 4 3.6L V6 2010-13
Porsche 970-1 Panamera S 4.8L V8 2010-13
Porsche 970-1 Panamera 4S 4.8L V8 2010-13
Porsche 970-1 Panamera GTS 4.8L V8 2013
Porsche 970-1 Panamera Turbo 4.8L V8 2010-13
Porsche 970-1 Panamera Turbo S 4.8L V8 2010-13

Porsche 970-2 Panamera 3.6L V6 2014-16
Porsche 970-2 Panamera 4 3.6L V6 2014-16
Porsche 970-2 Panamera S 3.0L V6 2014-16
Porsche 970-2 Panamera 4S 3.0L V6 2014-16
Porsche 970-2 Panamera GTS 4.8L V8 2014-16
Porsche 970-2 Panamera Turbo 4.8L 2014-16
Porsche 970-2 Panamera Turbo S 4.8L 2014-16

Porsche 95B-1 Macan S 3.0L V6 2014-18
Porsche 95B-1 Macan GTS 3.0L V6 2014-18
Porsche 95B-1 Macan Turbo 3.6L V6 2014-18

Diagram ref. 5. 

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

0PB105249
99911347640
99911349040
99911349041
94810121202
99710121200
99710121201
0PB105249

The product you are viewing cross references to these numbers