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- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
SET OF 2
Fits:
Porsche 993 1994-98
Porsche 993 Turbo
Now a permanent solution to leak-prone Porsche 993 factory plastic lower or upper valve covers. Over time, engine heat cycles cause the plastic valve covers to separate around the aluminium bolt sleeves causing an oil leak. Our replacement racing 993 lower or upper valve covers are precision-machined from aircraft-grade aluminium billet. These covers permanently correct the problem and help your engine run cooler by dissipating engine heat more efficiently due to their aluminium composition and finned surfaces.
• Never Leak
• Never Warp
• Cooler Running Engine
• Racing Durable
• Precision CNC Machined
• Straight Bolt-on
• 6061-T6 Aluminium Billet (Not Cast)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310511505BLK
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
SET OF 2
Fits:
Porsche 993 1994-98
Porsche 993 Turbo
Now a permanent solution to leak-prone Porsche 993 factory plastic lower or upper valve covers. Over time, engine heat cycles cause the plastic valve covers to separate around the aluminium bolt sleeves causing an oil leak. Our replacement racing 993 lower or upper valve covers are precision-machined from aircraft-grade aluminium billet. These covers permanently correct the problem and help your engine run cooler by dissipating engine heat more efficiently due to their aluminium composition and finned surfaces.
• Never Leak
• Never Warp
• Cooler Running Engine
• Racing Durable
• Precision CNC Machined
• Straight Bolt-on
• 6061-T6 Aluminium Billet (Not Cast)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310511505SIL
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
SET OF 2

Fits:
Porsche 993 1994-98
Now a permanent solution to leak-prone Porsche 993 factory plastic lower or upper valve covers. Over time, engine heat cycles cause the plastic valve covers to separate around the aluminium bolt sleeves causing an oil leak. Our replacement racing 993 lower or upper valve covers are precision-machined from aircraft-grade aluminium billet. These covers permanently correct the problem and help your engine run cooler by dissipating engine heat more efficiently due to their aluminium composition and finned surfaces.
• Never Leak
• Never Warp
• Cooler Running Engine
• Racing Durable
• Precision CNC Machined
• Straight Bolt-on
• 6061-T6 Aluminium Billet (Not Cast)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 18
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310511607BLK
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
SET OF 2

Fits:
Porsche 993 1994-98
Now a permanent solution to leak-prone Porsche 993 factory plastic lower or upper valve covers. Over time, engine heat cycles cause the plastic valve covers to separate around the aluminium bolt sleeves causing an oil leak. Our replacement racing 993 lower or upper valve covers are precision-machined from aircraft-grade aluminium billet. These covers permanently correct the problem and help your engine run cooler by dissipating engine heat more efficiently due to their aluminium composition and finned surfaces.
• Never Leak
• Never Warp
• Cooler Running Engine
• Racing Durable
• Precision CNC Machined
• Straight Bolt-on
• 6061-T6 Aluminium Billet (Not Cast)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 18
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310511607SIL
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
SET OF 2

Fits:
Porsche 993 1995-98 (except Turbo)
Tired of your wife nagging you about the oil puddles in the driveway? Rennline has the solution with our new billet, fully CNC machined valve covers. These valve covers are a direct bolt on replacement for your flimsy leaking factory covers, and are machined to accept the reusable OEM gaskets (available separately). With the corrosion resistant finish, chamfered edges, and tight gasket fitment, these valve covers are simply the best on the market. Available in Anodized clear or black finishes, all with or without the fins brushed. Also included are the spark plug wire retainers and retainer hardware for a clean installation.
Note: Pictures may not show actual product.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
M14
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
SET OF 2

Fits:
Porsche 993 1995-98
Porsche 993 Turbo
Tired of oil puddles in the driveway? Rennline has the solution with our new billet, fully CNC machined valve covers. These valve covers are a direct bolt on replacement for your flimsy leaking factory covers, and are machined to accept the reusable OEM gaskets (available separately). With the corrosion resistant finish, chamfered edges, and tight gasket fitment, these valve covers are simply the best on the market. Available in Anodized clear or black finishes, or powdercoat red all with or without the fins brushed. Also included are the spark plug wire retainers and retainer hardware for a clean installation.
Note: Pictures may not show actual product.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
M13
The product you are viewing cross references to these numbers
Porsche Camshaft Covers | Engine Sealing & Reliability Upgrades
Camshaft Covers seal and protect the camshaft housings, retaining engine oil while shielding vital valvetrain components from contamination. In Porsche engines, camshaft covers play a critical role in maintaining correct oil pressure, preventing leaks, and ensuring long-term valvetrain reliability—particularly in high-mileage or performance-driven vehicles.
Available from Design911, this range of Porsche camshaft covers includes upgraded and performance-focused solutions designed to improve sealing, durability, and resistance to heat-related distortion under demanding operating conditions.
What Do Camshaft Covers Do?
Camshaft covers enclose the camshaft housings and maintain a sealed lubrication environment.
Core Functions:
- Retain engine oil within the camshaft housing.
- Protect camshafts and valvetrain components.
- Maintain correct oil pressure to the top end.
- Prevent contamination from dirt and debris.
- Support reliable valve timing and operation.
Properly functioning camshaft covers are essential for engine health and efficiency.
Why Do Camshaft Covers Fail?
Over time, standard camshaft covers can degrade due to heat,
pressure, and material fatigue. Common failure causes include:
- Warping or distortion from repeated heat cycles.
- Gasket failure leading to oil leaks.
- Cracking of plastic or composite covers.
- Seal hardening due to age and temperature exposure.
- Increased crankcase pressure in tuned engines.
Failed camshaft covers can cause oil loss, misfires, and accelerated valvetrain wear.
Why Upgrade Camshaft Covers?
Upgraded camshaft covers are designed to improve durability and sealing performance.
Upgrade Benefits:
- Improved resistance to heat distortion.
- Enhanced sealing surfaces to reduce oil leaks.
- Stronger materials for long-term reliability.
- Ideal for high-mileage or performance engines.
- Supports clean, consistent top-end lubrication.
Upgrading camshaft covers helps protect the valvetrain and maintain engine performance under demanding conditions.
Highlights
- Porsche camshaft covers and sealing upgrades
- Improved oil retention and leak prevention
- Designed for performance and reliability
- Ideal for rebuilds and high-mileage engines
- Supports long-term valvetrain health