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Cylinder Head / Camshaft Carrier

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DISPLAYING 1 to 16 (of 20 products)
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99610418059/3KIT
Product Information
Product 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Related, superseded, cross reference or alternative numbers for comparison.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
99610418056
99610418057
99610418058
99610418059

The product you are viewing cross references to these numbers
Special Order item
99610418059
Product Information
Product Information
Cylinder head bolt long. M10 x 230.
24 Bolts Per Engine. Price is for EACH.

porsche

Fits:
Porsche 986 Boxster 2.7L / S 3.4L 2003-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 2002-05
Porsche 997 Carrera 2005-08

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

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Related, superseded, cross reference or alternative numbers for comparison.

99610418059
99610418056
99610418057
99610418058
99610418059
523.050

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99610418059/3
Product Information
Product 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

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Related, superseded, cross reference or alternative numbers for comparison.

99610418059
99610418056
99610418057
99610418058
99610418059

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Special Order item
99610117270
Product Information
Product Information
Cylinder head stud.
24Pc per Engine. Price is for each.

porsche

Fits:
Porsche 996 Turbo 2001-05
Porsche 997.1 Turbo / GT2 2007-09
Porsche 997.2 GT2 RS 2011
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram
Diagram ref no 6

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99610117270
99610117270

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99610117270/4
Product Information
Product Information
Cylinder head studs. SET OF 24.

arp

Fits:
Porsche 996 Turbo 2001-05
Porsche 997.1 Turbo / GT2 2007-09
Porsche 997.2 GT2 RS 2011
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram
Diagram ref no 6

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Related, superseded, cross reference or alternative numbers for comparison.

99610117270
99610117270
204-4210
99610438270
99610438271

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99610418059/4
Product Information
Product Information
Cylinder head bolt. M10 x 230.
SET OF 24 head studs, washers & nuts.

arp

Fits:
Porsche 986 Boxster 2.7L / S 3.4L 2003-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 2002-05
Porsche 997 Carrera 2005-08

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

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

99610418059
204-4707
99610418056
99610418057
99610418058
99610418059
99610418054

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SR050
Product Information
Product Information
Cylinder press for Porsche 996/997 GT3

stomski

Here is the ultimate tool to press the cylinders in and out of the water jacket on GT3, Turbo, and RS/RSR 996/997 engines.

This kit includes everything you need to safely, accurately, quickly, and conveniently perform this critical task.

Each kit contains:
• ring compressor (1 @102.7)*,
• Delrin cylinder spacers (4),
• complete stainless steel/AL press,
• aluminum cylinder bushing,
• bolts, and a sturdy storage case.

*100mm ring compressor (1) available separately.
SR050/1
Product Information
Product Information
Cylinder press for Porsche 996/997 GT3 with 100mm ring compressor

stomski

Here is the ultimate tool to press the cylinders in and out of the water jacket on GT3, Turbo, and RS/RSR 996/997 engines.

This kit includes everything you need to safely, accurately, quickly, and conveniently perform this critical task.

Each kit contains:
• ring compressor (1 @100),
• Delrin cylinder spacers (4),
• complete stainless steel/AL press,
• aluminium cylinder bushing,
• bolts, and a sturdy storage case.
Special Order item
99970739340
Product Information
Product Information
Engine cylinder base gasket. 104.00 x 2.00.
Sold each.

porsche

Fits:
Porsche 996 Turbo 2001-05
Porsche 997.1 Turbo 2007-09
Porsche 997.2 Turbo 2010-13
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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

99970739340
99970739340
843.010

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99970739340/1
Product Information
Product Information
Engine cylinder base gasket. Sold each.

Inner Diameter: 104 mm,
Outer diameter: 108 mm,
Thickness: 2 mm,

elring

Fits:
Porsche 996 Turbo 2001-05
Porsche 997.1 Turbo 2007-09
Porsche 997.2 Turbo 2010-13
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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99970739340
99970739340
843.010

The product you are viewing cross references to these numbers
Special Order item
99970502341
Product Information
Product Information
Engine cylinder cover base gasket. Sold each.
110.72 x 3.53

porsche

Fits:
Porsche 993 Carrera RS 3.7L 1995-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 4

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99970502341
99970502341

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99970502341/1
Product Information
Product Information
Engine cylinder cover base gasket, 110.72 x 3.53.
Often referred to as a rubber seal ring or O-ring, it is designed to fit precisely in its designated groove where the rotating or stationary component meets a housing, providing a durable and leak-resistant interface.
Sold each.

Fits:
Porsche 993 Carrera RS 3.7L 1995 - 1998

Diagram ref no 4

The sealing ring helps prevent oil, coolant or other fluids from leaking between closely fitted engine/transmission surfaces. It forms a compression seal around shafts or bores where fluid containment is critical. A properly functioning seal keeps fluids contained, minimizes the risk of contamination, and preserves lubrication where it’s needed most - such as around pistons, cylinders, or fluid passages.

Application: Engine or drivetrain sealing ring used in cylinder base or other fluid interface points where a precise rubber seal is required to maintain fluid containment and mechanical integrity.

Replace this sealing ring if you notice:
  Visible fluid leaks around engine or transmission joint areas
  Low oil or fluid levels without external explanation
  During engine or transmission removal and service
   When original seals show visible wear, cracking, or hardening

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

99970502341
99970502341

The product you are viewing cross references to these numbers
Special Order item
99970739440
Product Information
Product Information
Engine cylinder cover base gasket. 110.00 x 2.50.
Sold each.

porsche

Fits:
Porsche 996 Turbo 2001-05
Porsche 997.1 Turbo 2007-09
Porsche 997.2 Turbo 2010-13
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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

99970739440
99970739440
845.630

The product you are viewing cross references to these numbers
99970739440/1
Product Information
Product Information
Engine cylinder cover base gasket. Sold each.

Inner Diameter: 110 mm,
Outer diameter: 115 mm,
Thickness: 3 mm,

elring

Fits:
Porsche 996 Turbo 2001-05
Porsche 997.1 Turbo 2007-09
Porsche 997.2 Turbo 2010-13
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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

99970739440
99970739440
845.630

The product you are viewing cross references to these numbers
Special Order item
99610119373
Product Information
Product Information
Engine cylinder head gasket to fit cylinders 1-3 and 4-6.

porsche

Fits:
Porsche 911 (996) Turbo & GT2 2001-2005
Porsche 911 (996) GT3 1999-2005

Click 'Zoom in' for large parts diagram.
Diagram ref no 8

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

99610119373
99610119372
99610119373

The product you are viewing cross references to these numbers
99610119373/1
Product Information
Product Information
Engine cylinder head gasket to fit cylinders 1-3 and 4-6.

elring

Fits:
Porsche 911 (996) Turbo & GT2 2001-2005
Porsche 911 (996) GT3 1999-2005

Click 'Zoom in' for large parts diagram.
Diagram ref no 8

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

99610119373
99610119372
99610119373
124.041

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 20 products)
1 2
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About Cylinder Head / Camshaft Carrier

Precision Cylinder Head & Camshaft Covers – Engine Protection and Performance for Porsche Models

The cylinder head and camshaft covers play a vital role in protecting key engine components such as the valvetrain, camshafts, and cylinder head from dirt, debris, and oil contamination. Beyond protection, they ensure proper oil sealing and ventilation — maintaining consistent lubrication and pressure balance within the engine.

At Design911, we offer a wide selection of precision-engineered cylinder head and camshaft covers for both classic and modern Porsche engines. Crafted from high-grade aluminium, magnesium, and composite materials, these covers provide a perfect fit and long-lasting reliability while maintaining the clean, professional look expected from Porsche’s performance heritage.

Whether you’re restoring an air-cooled 911 or servicing a high-output 992, our manufacturer-quality components ensure leak-free operation and exceptional durability.

What Do Cylinder Head and Camshaft Covers Do?

These components serve as the protective shell for your engine’s valvetrain and upper oil channels. They keep contaminants out, manage internal pressure, and help maintain consistent lubrication.

Core Functions:

  • Seal the upper engine area, preventing oil leaks and contamination.
  • Protect the camshafts and valve train from debris and moisture.
  • Regulate crankcase ventilation, supporting optimal engine breathing.
  • Maintain correct oil flow for cooling and lubrication efficiency.

They are essential not only for reliability but also for maintaining the visual and mechanical integrity of your Porsche’s engine bay.

Why Do Cylinder Head / Camshaft Covers Fail?

Over time, heat, pressure, and oil exposure can degrade materials, seals, and gaskets. These issues can lead to leaks, poor ventilation, and even oil starvation in extreme cases.

Common Causes of Failure Include:

  • Cracked or warped covers from repeated heat cycles.
  • Degraded seals or gaskets, causing oil leaks.
  • Loose or fatigued fasteners, leading to uneven sealing pressure.
  • Blocked breather passages, increasing internal pressure.
  • Corrosion or contamination in older engines.

Replacing worn covers and seals restores oil control, prevents leaks, and preserves long-term engine health.

Why Replace with Precision-Engineered Covers?

Upgrading or replacing your covers ensures your Porsche engine operates as intended — leak-free, properly ventilated, and visually clean.

Key Benefits:

  • Restores sealing performance and eliminates oil leaks.
  • Protects vital valvetrain components from dirt and debris.
  • Maintains proper crankcase pressure and oil control.
  • Crafted from premium materials for superior heat and corrosion resistance.
  • Perfect fitment and finish, ensuring long-term reliability.
  • Compatible with a wide range of Porsche models, from classics to modern GT cars.

Precision covers also contribute to the engine’s aesthetic, maintaining the refined look Porsche owners expect.

Highlights:

  • High-strength cylinder head and camshaft covers for Porsche engines.
  • Precision-machined sealing surfaces for long-term oil-tight performance.
  • Manufacturer-quality materials – aluminium, magnesium, and composite options.
  • Improved oil control and internal ventilation. Ideal for engine rebuilds, upgrades, or restorations.
  • Compatible with air-cooled and water-cooled Porsche models.

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