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Gaskets & Sets

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DISPLAYING 33 to 48 (of 57 products)
1 2 3 4
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Related, superseded, cross reference or alternative numbers for comparison.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

The product you are viewing cross references to these numbers
99610420104/1
Product Information
Product Information
Engine head gasket. Fits: cylinder 1-3 or 4-6.
2 per engine.

elring

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Related, superseded, cross reference or alternative numbers for comparison.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

The product you are viewing cross references to these numbers
Special Order item
99611121770
Product Information
Product Information
Exhaust gasket for manifold.
Price is for each.

porsche

Fits:
Porsche 996 Turbo

Diagram ref no 6


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Related, superseded, cross reference or alternative numbers for comparison.

99611121770
99611121770

The product you are viewing cross references to these numbers
Special Order item
99311325851
Product Information
Product Information
Gasket for air injection cut-off valve.

porsche

Fits:
Porsche 993 Turbo
Porsche 996 Turbo

Click 'Zoom in' for large arts diagram.
Diagram ref no 20

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Related, superseded, cross reference or alternative numbers for comparison.

99311325851
99311325851
632.710

The product you are viewing cross references to these numbers
99311325851/1
Product Information
Product Information
Gasket for air injection cut-off valve.

elring

Fits:
Porsche 993 Turbo
Porsche 996 Turbo

Click 'Zoom in' for large arts diagram.
Diagram ref no 20

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Related, superseded, cross reference or alternative numbers for comparison.

99311325851
99311325851
632.710

The product you are viewing cross references to these numbers
F/HG3400H/300M
Product Information
Product Information
Hylomar Gasket 3400 is a modified anaerobic curing, flexible sealant designed to become a Formed in Place (FIP) Gasket when cured. The cured compound has good temperature resistance and high resistance to fretting. The cure is initiated when the compound is in contact with metal ions and in anaerobic conditions. The cure rate and final strength is dependent on the metals being joined and the temperature at which the component is used. The heat generated by a running engine will accelerate the cure.

Typical Applications
Hylomar Gasket 3400 can be used as a gasketing compound between machined surfaces. It is ideal for sealing between mating faces on engines and transmission components where resistance to temperature and vibration are essential.

INSTRUCTIONS FOR USE
Hylomar Gasket 3400 should be applied to clean and dry surfaces, free of contamination such as oil or grease. The compound may be dispensed by hand from cartridge, concertina pack, or via a screen printing system. Once applied the joint should be assembled as soon as practical. Any excess compound can be easily wiped off external surfaces with a clean cloth soaked in Acetone or other suitable solvents.

Typical Physical Properties:

UNCURED PRODUCT
Composition: Methyl-Methacrylate
Colour: Yellow
Viscosity @ 25°C / Brookfield Spindle 6 @ 2.5rpm: 100,000cps
Specific Gravity @ 25°C: 1.10 g/ml
Solvent Content:  None

Specific Gravity g/ml @ 25°C: 1.04
Flash Point: >100°C
Shelf Life: 1 Year @ 4° to 25°C

CURED PRODUCT
Handling Time: 40 minutes
Functional Cure Time: 4 – 6 hours
Full Cure Time : 24 – 72 hours

Shear Strength :  1.5 N/mm²
Mild Steel/Mild Steel BS 5350 Part C5
Aluminium/Aluminium BS 5350 Part C5

Temperature Range: -40° to 150°C

99711024700/2
Product Information
Product Information
Intake manifold gasket.
Sold each - 6 required per car

Fits:
Porsche 996 Carrera 2 / Carrera 4 3.4ltr - 1999 to 2001
Porsche 996 Carrera 2 / Carrera 4 / 4S 3.6ltr - 2002 to 2005

Diagram ref no 2

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99711024700
99611024750
99711024700

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Special Order item
99970741040
Product Information
Product Information
O-ring 39,20 x 3,00 water cooling. 

Fits:
Porsche 996 turbo - 2000 to 2005
Porsche 996 GT3 - 1999 to 2004
Porsche 997.1 turbo - 2007 to 2009
Porsche 997 GT3 - 2007 to 2011
Porsche Carrera GT - 2003 to 2006
Porsche 918 Spyder

Diagram ref no 14

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

99970741040
99970741040

The product you are viewing cross references to these numbers
99970741040/1
Product Information
Product Information
O-ring 39,20 x 3,00 water cooling
This OE match O-ring is a direct replacement for the original Porsche sealing ring used within the water cooling systems of Porsche 996 Turbo, 996 GT3, 997 Turbo, and 997 GT3 models. Manufactured to OE specifications, it features precise dimensions of 39.20mm x 3.00mm to ensure correct sealing performance and factory-style fitment.
Sold individually

Fits:
Porsche 996 turbo - 2000 to 2005
Porsche 996 GT3 - 1999 to 2004
Porsche 997.1 turbo - 2007 to 2009
Porsche 997 GT3 - 2007 to 2011
Porsche Carrera GT - 2003 to 2006
Porsche 918 Spyder

Diagram ref no 14

Proper sealing within the cooling system is essential for maintaining coolant pressure and preventing leaks that could lead to overheating or engine damage. OE Match construction ensures compatibility with original Porsche cooling system components and reliable sealing performance under demanding operating conditions.

Ideal for preventative maintenance, cooling system servicing, or engine rebuild work, this O-ring helps restore proper sealing integrity and reliable coolant circulation.

The O-ring creates a pressure-tight seal between cooling system components, preventing coolant leaks and maintaining correct cooling system pressure. It helps ensure efficient coolant circulation and reliable engine temperature control.

Function
Seals coolant system connections and housings
 Prevents coolant leakage under pressure
 Maintains correct cooling system pressure
 Supports reliable engine temperature regulation
 Resists heat, coolant exposure, and pressure cycling

Cooling system O-rings harden and lose elasticity over time due to heat exposure, coolant chemicals, and pressure cycling. A deteriorated seal can cause coolant leaks, pressure loss, overheating, and potential engine damage. Replacing worn O-rings during servicing helps maintain cooling system integrity and prevents costly repairs.

When to replace
  Coolant leaks around sealed connections
  During cooling system disassembly or servicing
  Signs of flattened, cracked, or hardened seals
  Loss of coolant pressure
  During engine rebuild or preventative maintenance

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

99970741040
99970741040

The product you are viewing cross references to these numbers
Special Order item
99970734440
Product Information
Product Information
Chain adjuster sealing o-ring. 18,77 x 1,78
3 per engine. Price is for each.

porsche

Fits:
Porsche 996
Porsche 986 Boxster
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997.1 Gen

Click 'Zoom in' for large parts diagram.
Diagram ref no 25

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

99970734440
99970734440

The product you are viewing cross references to these numbers
99970734440/1
Product Information
Product Information
O-ring - 18.77 x 1.78 - for timing chain adjuster or tensioner. 

Fits:

Porsche 986 Boxster / S 1997-04 - x3 required
Porsche 987 Boxster / S 2005-08 - x3 required
Porsche 987 Cayman / S 2006-08 - x4 required

Porsche 996 Carrera 1998-05 - x3 required
Porsche 997-1 Carrera 2005-08 - x4 required

Diagram ref. 25.



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

99970734440
99970734440

The product you are viewing cross references to these numbers
99610680102/1
Product Information
Product Information
O-Ring for water radiator hose. Left or right.
4 per car. Price is for each.

oematch

Fits:
Porsche 996 Turbo 2001-05

Click 'Zoom in' for large parts diagram.
Diagram ref no 31

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

99610680102
99610680102

The product you are viewing cross references to these numbers
C4492
Product Information
Product Information
Cylinder head gasket - 102mm Bore size
MLS (Multi Layer Steel) version

Price is for each, 2 required per car

cometic

Fits
Porsche 996 Turbo to 2001 to 2005
Porsche 996 GT3 - 2000 to 2005
Porsche 996 GT3 RS - 2004

Engine Codes
M96.70 - 996 Turbo 3.6ltr /309 KW
M96.70S - 996 GT2 3.6ltr /340 KW
M96.70SL
M96.76 - 996 GT3 3.6ltr /265 KW
M96.79 - 996 GT3 RS 3.6ltr /280 KW

Please check Bore Size and Thickness before ordering

Material: MLS (Multi Layer Steel)
Compressed Thickness: .027 inch to 0.092 inch
Bore Shape: Round
Bore Size (MM): 102
Number of layers: 3
Orientation: None (fits both banks)

Gaskets are produced to order
Estimated Delivery Time: 5-6 Weeks


MLS Gaskets
The embossed outer layers of our head gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface
finishes. The MLS Gasket (Multi-Layer Steel) features an active combustion seal on multiple layers.

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

C4492
99710417072
99710417071
99610417072

The product you are viewing cross references to these numbers
C14141-040
Product Information
Product Information
Cylinder head gasket - 103.5mm Bore size
MLX (Multi Layer Steel Stopper) version

Price is for each, 2 required per car

cometic

Fits
Porsche 996 Turbo
Porsche 996 GT3
Porsche 996 GT2

Engine Codes
M96.70 - Turbo 3.6ltr /309 KW
M96.70S - GT2 3.6ltr /340 KW
M96.70SL - GT2 3.6ltr /340 KW
M96.76 - GT3 3.6 /265 KW
M96.79 - GT3 and GT3 RS 3.6ltr /280 KW

Please check Bore Size and Thickness before ordering

Material: MLX (Multi Layer Steel Stopper)
Compressed Thickness: .030 inch
Bore Shape: Round
Bore Size (MM): 103.5
Number of layers: 3
Orientation: None (fits both banks)

Gaskets are produced to order
Estimated Delivery Time: 5-6 Weeks


MLX Gaskets
Our MLX Gasket (Multi-Layer-Steel-Stopper) features an extra 'stopper' fold-over layer providing a torque limiting surface that prevents yielding of the combustion seals.
High temperature polymer along with embossments provide a micro seal for fluids against the head and block surface.

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

C14141-040
99710417072
99710417071
99610417072

The product you are viewing cross references to these numbers
C14076-030
Product Information
Product Information
Cylinder head gasket - 104.5mm Bore size
MLS (Multi Layer Steel) version

Price is for each, 2 required per car

cometic

Fits
Porsche 996 Turbo
Porsche 996 GT3
Porsche 996 GT2

Engine Codes
M96.70 - Turbo 3.6ltr /309 KW
M96.70S - GT2 3.6ltr /340 KW
M96.70SL - GT2 3.6ltr /340 KW
M96.76 - GT3 3.6 /265 KW
M96.79 - GT3 and GT3 RS 3.6ltr /280 KW

Please check Bore Size and Thickness before ordering

Material: MLS (Multi Layer Steel)
Compressed Thickness: .030 inch
Bore Shape: Round
Bore Size (MM): 104.5
Number of layers: 3
Orientation: None (fits both banks)

Gaskets are produced to order
Estimated Delivery Time: 5-6 Weeks


MLS Gaskets
The embossed outer layers of our head gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface
finishes. The MLS Gasket (Multi-Layer Steel) features an active combustion seal on multiple layers.

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

C14076-030
99710417072
99710417071
99610417072

The product you are viewing cross references to these numbers
C14077-040
Product Information
Product Information
Cylinder head gasket - 104mm Bore size / .040 inch thick
MLS (Multi Layer Steel) version

Price is for each, 2 required per car

cometic

Fits
Porsche 996 Turbo
Porsche 996 GT3
Porsche 996 GT2

Engine Codes
M96.70 - Turbo 3.6ltr /309 KW
M96.70S - GT2 3.6ltr /340 KW
M96.70SL - GT2 3.6ltr /340 KW
M96.76 - GT3 3.6 /265 KW
M96.79 - GT3 and GT3 RS 3.6ltr /280 KW

Please check Bore Size and Thickness before ordering

Material: MLS (Multi Layer Steel)
Compressed Thickness: .040 inch
Bore Shape: Round
Bore Size (MM): 104
Number of layers: 3
Orientation: None (fits both banks)

Gaskets are produced to order
Estimated Delivery Time: 5-6 Weeks


MLS Gaskets
The embossed outer layers of our head gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface
finishes. The MLS Gasket (Multi-Layer Steel) features an active combustion seal on multiple layers.

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

C14077-040
99710417072
99710417071
99610417072

The product you are viewing cross references to these numbers
DISPLAYING 33 to 48 (of 57 products)
1 2 3 4
Also found on these pages
About Gaskets & Sets

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.

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