Engine cylinder head inlet valve. Porsche Boxster 986 3.2L / 996  ❭  99610511155

Engine Cylinder Head Inlet Valve.
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.

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