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Engine Bolts / Studs
By OE Match
Refine by Car Type
- 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 S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 S / GTS 3.4L 2012-16
Filter by brand
Vehicle Group
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- 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 Cayman S 3.4L 987C 2005-08
Information
Cylinder head bolt long & head gaskets Porsche 996 3.6L / Cayman 3.4L
Fits:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610418059
The product you are viewing cross references to these numbers
Engine Cylinder Head Gasket Kit
The cylinder head gasket is a critical component that seals the cylinder head to the engine block. It serves several key functions, It seals the combustion chamber, ensuring proper compression for efficient engine performance. It prevents coolant and engine oil from mixing by sealing the fluid passages between the cylinder head and engine block.
Signs of Cylinder Head Gasket Failure
A failing head gasket can lead to serious engine problems. Common symptoms include:
- Engine overheating
- Low cylinder compression
- External coolant or oil leaks
- White smoke from the exhaust
- Bubbles in the radiator or coolant reservoir
- Milky or white-colored engine oil
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
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Boxster 987 S 3.4L 2005-08/08
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche Boxster 981 S / GTS 3.4L 2012-16
Click 'Zoom in' for large parts diagram
Diagram ref no 19 & 20.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610418059
99610420104
99610420102
99610418058
99610418059
99610418053
99610418055
99610418056
99610418054
99610418057
The product you are viewing cross references to these numbers
About kit
This kit is comprised of the following items:
24 x Cylinder head bolt long. Porsche Boxster / Cayman / 996 / 997 (99610418059/3
2 x Engine head gasket. Porsche Boxster / Cayman / 996 / 997 (99610420104/1
Price: £214.70
In stock
Vehicle Group
- 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 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- 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 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
Cylinder head bolt long. M10 x 230
Cylinder head bolts are high-strength engine fasteners that clamp the cylinder head, head gasket and engine block together. The OE Match set contains 12 long bolts, which is the correct quantity required for one cylinder head in Porsche M96 and M97 engines
SET OF 12 is required per cylinder head (two sets per engine)
Fits:
Porsche 986 Boxster 2.7L / S 3.4L 2003 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2005 - 2008
Porsche 996 C2 / C4 / C4S 2002 - 2005
Porsche 997.1 Carrera 2005 - 2008
Diagram ref no 20.
These bolts are engineered to withstand extreme engine conditions such as high combustion pressure, temperature fluctuations and constant mechanical stress. OE Match bolts are produced to match the original Porsche specifications to ensure correct torque application and reliable engine assembly.
The cylinder head bolts apply precise clamping force between the cylinder head and engine block. This pressure compresses the head gasket, creating a tight seal that prevents coolant or oil leakage while maintaining proper compression inside the combustion chambers.
Replacing the bolts during engine service helps maintain the integrity of the engine assembly and ensures reliable performance.
Function
• Engine Fastening: Secures the cylinder head to the engine block
• Gasket Compression: Maintains the seal of the head gasket
• Combustion Stability: Preserves compression inside the cylinders
• Structural Strength: Designed to withstand heat, pressure and engine vibration
Cylinder head bolts are subjected to extreme pressure and thermal expansion during engine operation. Many modern bolts are torque-to-yield fasteners, meaning they stretch slightly during installation and should be replaced once removed. Using new bolts during engine repairs ensures correct clamping force and prevents potential head gasket failure, oil leaks or overheating issues.
Consider replacing cylinder head bolts when:
• Replacing the cylinder head gasket
• Performing a top-end engine rebuild
• Removing or reinstalling the cylinder head
• High-mileage engine maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610418059
The product you are viewing cross references to these numbers
Cylinder head bolts are high-strength engine fasteners that clamp the cylinder head, head gasket and engine block together. The OE Match set contains 12 long bolts, which is the correct quantity required for one cylinder head in Porsche M96 and M97 engines
SET OF 12 is required per cylinder head (two sets per engine)
Fits:
Porsche 986 Boxster 2.7L / S 3.4L 2003 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2005 - 2008
Porsche 996 C2 / C4 / C4S 2002 - 2005
Porsche 997.1 Carrera 2005 - 2008
Diagram ref no 20.
These bolts are engineered to withstand extreme engine conditions such as high combustion pressure, temperature fluctuations and constant mechanical stress. OE Match bolts are produced to match the original Porsche specifications to ensure correct torque application and reliable engine assembly.
The cylinder head bolts apply precise clamping force between the cylinder head and engine block. This pressure compresses the head gasket, creating a tight seal that prevents coolant or oil leakage while maintaining proper compression inside the combustion chambers.
Replacing the bolts during engine service helps maintain the integrity of the engine assembly and ensures reliable performance.
Function
• Engine Fastening: Secures the cylinder head to the engine block
• Gasket Compression: Maintains the seal of the head gasket
• Combustion Stability: Preserves compression inside the cylinders
• Structural Strength: Designed to withstand heat, pressure and engine vibration
Cylinder head bolts are subjected to extreme pressure and thermal expansion during engine operation. Many modern bolts are torque-to-yield fasteners, meaning they stretch slightly during installation and should be replaced once removed. Using new bolts during engine repairs ensures correct clamping force and prevents potential head gasket failure, oil leaks or overheating issues.
Consider replacing cylinder head bolts when:
• Replacing the cylinder head gasket
• Performing a top-end engine rebuild
• Removing or reinstalling the cylinder head
• High-mileage engine maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610418059
99610418056
99610418057
99610418058
99610418059
The product you are viewing cross references to these numbers
About kit
This kit is comprised of the following items:
12 x Cylinder head bolt long. Porsche Boxster / Cayman / 996 / 997 (99610418059/3
Price: £71.40
In stock
Vehicle Group
- 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 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- 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 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
Cylinder head bolt long. M10 x 230
Cylinder head bolts are essential structural fasteners used in modern engines to clamp the cylinder head, head gasket and engine block together. The OE Match bolt is the long version used in Porsche M96 and M97 engines found in various Boxster, Cayman and 911 models.
Sold individually, 24 bolts required per engine.
Fits:
Porsche 986 Boxster 2.7L / S 3.4L 2003 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2005 - 5008
Porsche 996 C2 / C4 / C4S 2002 - 2005
Porsche 997.1 Carrera 2005 - 2008
Diagram ref no 20.
The cylinder head bolt applies the precise clamping force needed to hold the cylinder head against the engine block while compressing the head gasket. This ensures a sealed combustion chamber and prevents coolant or oil leakage. Correctly functioning head bolts are critical to maintaining engine compression, cooling efficiency and overall engine reliability.
Function
• Engine Assembly Fastening: Secures the cylinder head to the engine block
• Compression Seal: Maintains correct sealing of the head gasket
• Thermal Stability: Withstands engine heat cycles and mechanical stress
• Engine Integrity: Ensures proper combustion chamber sealing and pressure control
Cylinder head bolts experience extreme stress from combustion pressure, temperature changes and engine vibration. Over time or after repeated tightening cycles, bolts can stretch or lose their clamping strength. Replacing them during engine repairs helps maintain the correct seal between the head and block, preventing coolant leaks, compression loss or engine overheating.
Consider replacing cylinder head bolts when:
• Rebuilding or repairing the engine
• Replacing the head gasket
• Engine overheating or compression loss occurs
• The original bolts have been previously torqued or stretched
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610418059
The product you are viewing cross references to these numbers
Cylinder head bolts are essential structural fasteners used in modern engines to clamp the cylinder head, head gasket and engine block together. The OE Match bolt is the long version used in Porsche M96 and M97 engines found in various Boxster, Cayman and 911 models.
Sold individually, 24 bolts required per engine.
Fits:
Porsche 986 Boxster 2.7L / S 3.4L 2003 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2005 - 5008
Porsche 996 C2 / C4 / C4S 2002 - 2005
Porsche 997.1 Carrera 2005 - 2008
Diagram ref no 20.
The cylinder head bolt applies the precise clamping force needed to hold the cylinder head against the engine block while compressing the head gasket. This ensures a sealed combustion chamber and prevents coolant or oil leakage. Correctly functioning head bolts are critical to maintaining engine compression, cooling efficiency and overall engine reliability.
Function
• Engine Assembly Fastening: Secures the cylinder head to the engine block
• Compression Seal: Maintains correct sealing of the head gasket
• Thermal Stability: Withstands engine heat cycles and mechanical stress
• Engine Integrity: Ensures proper combustion chamber sealing and pressure control
Cylinder head bolts experience extreme stress from combustion pressure, temperature changes and engine vibration. Over time or after repeated tightening cycles, bolts can stretch or lose their clamping strength. Replacing them during engine repairs helps maintain the correct seal between the head and block, preventing coolant leaks, compression loss or engine overheating.
Consider replacing cylinder head bolts when:
• Rebuilding or repairing the engine
• Replacing the head gasket
• Engine overheating or compression loss occurs
• The original bolts have been previously torqued or stretched
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610418059
99610418056
99610418057
99610418058
99610418059
The product you are viewing cross references to these numbers
Price: £5.95
In stock
DISPLAYING 1 to 3 (of 3 products)
Also found on these pages
About Engine Bolts / Studs
OEMatch Engine Bolts / Studs — Durability, Sealing, Performance
Engine bolts and studs are small but essential fasteners that secure cylinder heads, crankcases, connecting rods and manifolds on Porsche models. They maintain sealing, alignment and torque integrity during servicing, rebuilds and performance work; inspect fasteners for stretch, corrosion and thread damage during service.
Understanding OEMatch Engine Bolts / Studs
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original engine bolts / studs.
OE (Original Equipment) refers to parts matching original specifications for the engine bolts / studs and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM engine bolts / studs engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
OE (Original Equipment) refers to parts matching original specifications for the engine bolts / studs and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM engine bolts / studs engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Engine fasteners must deliver consistent clamping force while resisting stretching, vibration and corrosion. They secure critical assemblies and preserve internal clearances. OEMatch supplies a wide selection of Porsche components, from gaskets to suspension hardware, engine parts and interior trim. The catalogue includes thousands of part numbers and cross-references and is continually expanded to support maintenance and restoration.
Benefits Include- Consistent clamping force and torque retention to preserve seals and clearances
- High fatigue resistance to resist loosening under repeated torque cycles
- Improved corrosion protection with suitable coatings or materials
- Metal fatigue or stretching from repeated torque applications
- Corrosion and oxidation, especially in high-heat or humid conditions
- Incorrect torque, over-tightening or under-torquing during installation
- Thread wear or damage from debris, cross-threading or improper handling
The Importance of Replacing with OEMatch Engine Bolts / Studs
During an engine rebuild or major service, replacing aged or stressed bolts and studs helps maintain sealing, alignment and torque integrity. Correct-grade fasteners reduce the risk of leaks, distortion and mechanical failure and support reliable long-term operation on Porsche engines. Where critical, follow model-specific specifications for material grade and torque values.Advantages
- Direct-fit replacements engineered to match original dimensions and tolerances for Porsche models
- Available in high-tensile and corrosion-resistant finishes to suit application requirements
- Precision threads for repeatable installation and reliable torque control
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