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- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Engine cylinder heads Porsche 911 3.2L Carrera 170 kW (230 hp) M930.20 / M930.21 (Reconditioned)
SET OF 6
Fits: Porsche 911 3.2L Carrera 170 kW (230 hp) M930.20 / M930.21
Please note: Reconditioned units are sold on an exchange basis, A surcharge will be held and then refunded when the old one is returned.
Please note good reconditioned cylinder heads are becoming very hard for us to supply and this is simply because the core exchange units are not being returned to us.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010403306
The product you are viewing cross references to these numbers
PLEASE NOTE:
- Used parts need to be sent to us within 30 days from the date of the invoice. Returned items outside this window may be sent back to you as we work on strict return windows with our suppliers.
- The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
- Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
- Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
- All surcharges and exchanges are subject to our terms and conditions.
- 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
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
- 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
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
This kit is comprised of the following items:
- 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
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
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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 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
Timing chain tensioner blade
This OE Match timing chain tensioner blade is a replacement guide rail used within the engine timing chain system. It provides a controlled contact surface for the timing chain and works together with the chain tensioner to maintain correct chain position and tension.
Fits
Porsche 997.1 Carrera 3.8L 2005 - 2008
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005 - 2008
Porsche 987C.1 Cayman 2.7L / 3.4L 2006 - 2008
Diagram ref no 30
What This Product Does
Located within the camshaft drive assembly, the blade provides a contact surface for the chain. It cooperates with the tensioning mechanism to control chain movement and support consistent tracking on applicable M96 / M97 flat-six engines.
Functions
- Supports the chain along its intended route.
- Transfers tensioner action through the blade.
- Helps limit unwanted chain movement and vibration.
- Contributes to stable camshaft drive operation.
Technical Details
- 99610515600: Left bank, cylinders 1–3.
- 99610515801: Right bank, cylinders 4–6.
Symptoms of Fault
- Rattling or slapping sounds around the chain drive.
- Visible scoring, fractures or missing sections on the blade.
- Guide fragments discovered during oil-system inspection.
- Timing deviation faults requiring further investigation.
These findings do not establish blade failure on their own; inspect the complete timing assembly before selecting replacement components.
Why Replacement Matters
Repeated chain contact, temperature changes and oil exposure can deteriorate the guiding surface. Renewing a damaged blade addresses wear at that contact point. OE Match provides a Porsche-focused replacement option, with application and specification checks forming part of its component assessment.
Consider blade renewal during chain-drive repairs, camshaft timing work or an engine rebuild when inspection identifies deterioration. Assess the chains, tensioners and neighbouring guides together rather than assuming one replacement will resolve every source of noise.
FAQs
Which reference should I select?
Match the original reference and cylinder bank: 99610515600 serves cylinders 1–3, while 99610515801 serves cylinders 4–6.
Does start-up noise prove the blade needs replacing?
No. Increasing or persistent rattling warrants diagnosis of the chain drive, including its tensioners and guides.
Should related guides be inspected?
Yes. Check adjoining timing components for wear whenever the assembly is accessible.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610515
The product you are viewing cross references to these numbers