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- Porsche 914 (1970-1976)
Fits:
Porsche 914-2,0
M GB0 010 050>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 15
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
039101403
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 986 2.7L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
The OE Match Engine Cylinder Head Inlet Valve is a high-quality replacement valvetrain component designed to regulate the flow of air and fuel into the engine's combustion chamber. Manufactured to OE specifications for fit, precision and durability, this inlet valve is essential for maintaining efficient engine breathing, combustion performance and long-term engine reliability.
Sold Each.
X12 Required Per Car.
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
Diagram Ref No 8
Produced from premium-grade, heat-resistant materials, the inlet valve is engineered to withstand the constant mechanical loads and high operating temperatures associated with modern engine operation. Working in conjunction with the camshaft, valve springs, valve guides and cylinder head assembly, it ensures precise control of intake airflow, helping the engine deliver optimal power, fuel efficiency and responsiveness.
What This Product Does:
- Controls the intake of air and fuel into the combustion chamber.
- Opens and closes in precise timing with engine operation.
- Maintains an effective seal during compression and combustion cycles.
- Supports efficient airflow and engine breathing.
- Helps maximise engine performance and throttle response.
- Contributes to fuel efficiency and emissions control.
- Forms a critical part of the engine valvetrain system.
Symptoms Of Wear Or Failure:
- Loss of engine power and performance.
- Rough idle or uneven engine running.
- Engine misfires.
- Poor throttle response and acceleration.
- Increased fuel consumption.
- Low compression in the affected cylinder.
- Difficulty starting the engine.
- Ticking or tapping noises from the cylinder head.
- Engine management warning lights or fault codes.
- Failed compression or leak-down test results.
Why Replacement Matters:
- Inlet valves are subjected to continuous opening and closing cycles while being exposed to heat, combustion by-products and airflow turbulence. Over time, valves can become worn, bent, burnt, carbon-contaminated or develop sealing issues that negatively affect engine efficiency and performance.
- A damaged inlet valve can restrict airflow into the combustion chamber, resulting in poor combustion, reduced power output and increased fuel consumption. If left unresolved, valve-related problems can contribute to compression loss and may cause additional wear to valve seats, cylinder heads and other internal engine components.
- Replacing a worn or damaged inlet valve restores proper airflow, improves combustion efficiency and helps maintain optimal engine performance. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring reliable operation and helping protect your Porsche engine from premature wear and costly repairs.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610511105
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
The OE Match Engine Cylinder Head Inlet Valve is a high-quality replacement valvetrain component designed to control the flow of the air-fuel mixture into the engine's combustion chamber. Manufactured to OE specifications for fit, precision and durability, this inlet valve plays a crucial role in maintaining efficient engine breathing, combustion efficiency and overall engine performance.
Fits:
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
Diagram Ref No 8
Constructed from premium-grade, heat-resistant materials, the inlet valve is engineered to withstand constant operation, repeated opening and closing cycles, and the demanding conditions found within the cylinder head. Working alongside the camshaft, valve springs, valve guides and cylinder head assembly, it ensures precise airflow management and reliable combustion throughout the engine's operating range.
What This Product Does:
- Regulates the intake of air and fuel into the combustion chamber.
- Opens and closes in precise synchronisation with the engine cycle.
- Maintains an effective seal during compression and combustion.
- Supports efficient airflow and cylinder filling.
- Helps maximise engine power and throttle response.
- Contributes to fuel economy and emissions control.
- Forms an essential part of the engine valvetrain system.
Symptoms Of Wear Or Failure:
- Reduced engine power and acceleration.
- Rough idle or uneven engine operation.
- Engine misfires.
- Poor throttle response.
- Increased fuel consumption.
- Low compression in the affected cylinder.
- Difficulty starting the engine.
- Ticking or tapping noises from the cylinder head.
- Engine management warning lights or fault codes.
- Failed compression or leak-down test results.
Why Replacement Matters:
- Inlet valves operate continuously under demanding conditions, experiencing thousands of opening and closing cycles every minute while being exposed to heat, combustion deposits and airflow turbulence. Over time, valves can become worn, bent, burnt, carbon-contaminated or develop sealing issues that reduce engine efficiency and performance.
- A damaged inlet valve can restrict airflow into the combustion chamber, resulting in poor combustion, reduced power output and increased fuel consumption. If left unresolved, valve-related problems can lead to compression loss and may cause additional damage to valve seats, cylinder heads and other internal engine components.
- Replacing a worn or damaged inlet valve restores proper airflow, improves combustion efficiency and helps maintain optimal engine performance. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring reliable operation and helping protect your Porsche engine from premature wear and costly repairs.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610511155
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- 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
The OE Match Engine Cylinder Head Exhaust Valve is a precision replacement valvetrain component designed to control the release of burnt combustion gases from the engine cylinder.
Fits:
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- 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
Diagram Ref No 9
Located within the cylinder head, the exhaust valve opens at the correct point in the engine cycle to allow combustion gases to leave the cylinder and enter the exhaust system. It then closes firmly against the valve seat to seal the combustion chamber during the compression and power strokes.
Because exhaust valves are directly exposed to extremely hot combustion gases, they operate under demanding thermal and mechanical conditions. Correct valve condition and seating are therefore essential for maintaining cylinder compression, efficient combustion and reliable engine performance.
This OE Match replacement provides an OE-style solution for engine repair, cylinder-head refurbishment or complete engine rebuilding.
What This Product Does:
- Controls the flow of exhaust gases out of the combustion chamber.
- Opens to allow burnt gases to enter the exhaust system.
- Closes against the valve seat to seal the cylinder.
- Helps maintain correct cylinder compression.
- Supports efficient combustion and engine performance.
- Works with the camshaft, lifters, valve spring, valve guide and valve seat.
- Helps maintain consistent engine power and smooth running.
- Provides the correct sealing surface between the valve and cylinder head.
- Replaces a burnt, bent, worn or damaged original exhaust valve.
The valve face must form an accurate seal against the valve seat every time the valve closes. Even relatively minor damage to the valve face or stem can affect cylinder sealing and engine performance.
Symptoms Of Wear Or Failure:
A worn, burnt or damaged exhaust valve may cause:
- Engine misfires.
- Rough or unstable idle.
- Loss of engine power.
- Poor acceleration.
- Reduced compression in the affected cylinder.
- High cylinder leak-down readings.
- Air leakage heard through the exhaust during a leak-down test.
- Difficulty starting the engine.
- Increased fuel consumption.
- Engine management warning light.
- Misfire-related fault codes.
- Irregular exhaust note.
- Ticking or tapping noises from the cylinder head.
- Burnt, pitted or eroded valve face.
- Bent or excessively worn valve stem.
- Excessive carbon deposits.
- Visible overheating or discolouration of the valve.
A damaged exhaust valve can prevent the cylinder from sealing correctly, allowing compression and hot combustion gases to escape into the exhaust port.
Why Replacement Matters:
Exhaust valves operate in one of the hottest areas of the engine. Every combustion cycle exposes the valve head and seating surface to intense heat while the valve repeatedly opens and closes at high speed.
Over time, an exhaust valve can suffer from:
- Valve-face erosion.
- Pitting or burning.
- Carbon build-up.
- Stem wear.
- Mechanical distortion.
- Overheating.
- Poor seating caused by valve-guide or valve-seat wear.
Once the valve can no longer seal correctly, compression in the affected cylinder can fall. This can lead to misfires, reduced power, rough running and increased fuel consumption.
Replacing a damaged exhaust valve helps restore:
- Correct combustion-chamber sealing.
- Cylinder compression.
- Smooth engine operation.
- Reliable exhaust-gas control.
- Consistent engine performance.
- Correct valvetrain operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610524700
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 986 2.7L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
Sold each - 12 required per car.
Fits:
Porsche 986 Boxster 2.5ltr - 1997 to 1999 Engine Code M96.20
Porsche 986 Boxster 2.7ltr - 1999 to 2004 Engine Code M96.22 / M96.23
Porsche 987 Boxster 2.7Ltr - 2005 to 2008 Engine Code M96.25
Diagram Ref No 9.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610511308
The product you are viewing cross references to these numbers