Engine cylinder head inlet valve. Porsche 911 (993) 3.8 Carrera RS  ›  99310540942

Engine Cylinder Head Exhaust Valve.
Restore dependable engine performance with this OE Match Engine Cylinder Head Exhaust Valve, manufactured as a direct replacement. Produced to OE-style specifications, this exhaust valve is designed to control the release of combustion gases from the cylinder, maintaining efficient engine operation, correct compression, and reliable valve train performance.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65

  
Diagram Ref No 11

Exhaust valves operate under extreme temperatures and repeated combustion cycles, making them one of the most highly stressed components within the engine. Over time, heat, carbon deposits, corrosion, or insufficient lubrication can cause the valve face, stem, or seating surface to wear or burn, leading to poor sealing and reduced engine efficiency. Replacing worn or damaged exhaust valves restores proper combustion sealing and exhaust gas flow, making this OE Match component ideal for routine maintenance, engine repairs, rebuilds, and Porsche restoration projects.  

What This Product Does:

• Controls the release of exhaust gases from the combustion chamber.
• Maintains correct cylinder sealing during the combustion cycle.
• Supports efficient engine performance and combustion.
• Helps maintain correct compression and valve timing.
• Restores proper exhaust gas flow.
• Replaces worn, burnt, or damaged original exhaust valves.
• Provides an OE-style fit and dependable quality.

Symptoms Of Wear Or Failure:

• Loss of engine power.
• Reduced engine compression.
• Rough or uneven idle.
• Engine misfires.
• Excessive valve train noise.
• Burnt, pitted, or cracked valve faces.
• Increased exhaust emissions.
• Excessive heat damage or carbon build-up on the valve.

Why Replacement Matters:

• The exhaust valve plays a critical role in allowing spent combustion gases to exit the engine while maintaining an effective seal during compression and combustion. A worn, burnt, or damaged exhaust valve can reduce engine performance, lower compression, increase fuel consumption, and eventually cause serious engine damage if left unresolved.
• Replacing the exhaust valve restores efficient exhaust gas flow, reliable cylinder sealing, and smooth engine operation while helping to protect other valve train components from unnecessary wear. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match engine cylinder head exhaust valve provides the correct fit, dependable quality, and long-lasting durability, making it an ideal choice for Porsche maintenance, engine rebuilds, repairs, and restoration projects.

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

61610540650

The product you are viewing cross references to these numbers

Engine Cylinder Head Intake Valve.

Restore reliable engine performance with this OE Match Engine Cylinder Head Intake Valve, manufactured as a direct replacement. Produced to OE-style specifications, this intake valve precisely controls the flow of the air and fuel mixture into the combustion chamber, ensuring efficient combustion, smooth engine operation, and optimum performance.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65  

Diagram Ref No 10

Operating under constant heat, pressure, and repeated opening and closing cycles, intake valves are subject to gradual wear over time. Carbon build-up, stem wear, valve face erosion, or physical damage can prevent the valve from sealing correctly, reducing engine efficiency and performance. Replacing worn or damaged intake valves restores proper cylinder sealing and airflow, making this OE Match component an excellent choice for routine maintenance, engine repairs, rebuilds, and Porsche restoration projects.  

What This Product Does:

• Controls the intake of the air and fuel mixture into the combustion chamber.
• Maintains correct cylinder sealing during the combustion cycle.
• Supports efficient combustion and engine performance.
• Helps deliver smooth power and throttle response.
• Restores correct valve operation during engine rebuilds.
• Replaces worn, burnt, or damaged original intake valves.
• Provides an OE-style fit and dependable quality.

Symptoms Of Wear Or Failure:

• Loss of engine power.
• Rough or uneven idle.
• Reduced engine compression.
• Misfiring cylinders.
• Poor fuel economy.
• Excessive valve train noise.
• Burnt, pitted, or bent valve faces.
• Excessive oil consumption caused by valve-related wear.

Why Replacement Matters:

• The intake valve is a critical component of the engine's valve train, regulating the precise amount of air and fuel entering each cylinder while maintaining an effective seal throughout the combustion cycle. A worn, burnt, or damaged intake valve can reduce compression, lower engine performance, increase fuel consumption, and eventually lead to costly engine damage if left unresolved.
• Replacing the intake valve restores proper airflow, combustion efficiency, and reliable engine performance while helping to protect other valve train components from unnecessary wear. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match engine cylinder head intake valve provides the correct fit, dependable quality, and long-lasting durability, making it an ideal choice for Porsche maintenance, engine rebuilds, repairs, and restoration projects.

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

61610540200

The product you are viewing cross references to these numbers

OE Match engine inlet valve for Porsche 356A and 356B models. Four are required and each valve is supplied individually.

Fits

• Porsche 356A 1955–59
• Porsche 356B 1959–63

Diagram reference 10

What This Product Does

The intake valve controls the entry of the air and fuel mixture into the combustion chamber. When closed, it also contributes to the seal needed to maintain cylinder compression during the engine cycle.

Functions

• Controls intake flow into the combustion chamber
• Helps maintain cylinder sealing and compression
• Supports correct combustion and smooth engine operation
• Replaces a worn or damaged original intake valve

Technical Details

• Product type: engine inlet valve
• Valve dimensions: 10 mm x 130.6 mm
• Quantity required: four; supplied individually

Symptoms of Fault

• Low or uneven cylinder compression
• Rough idle or persistent misfiring
• Reduced engine power
• Pitting, burning or physical damage to the valve face
• Poor sealing identified during compression or leak-down testing

Why Replacement Matters

A worn, burnt or damaged intake valve may no longer seal correctly against its seat, allowing compression to escape and disrupting intake flow. Replacement is commonly carried out during cylinder-head refurbishment or an engine rebuild to restore correct valve operation. The valve seat, guide, spring and associated retaining components should also be inspected before assembly.

FAQs

• How many valves are required? Four are required, with each valve supplied individually.
• Is this an intake or exhaust valve? This part is an engine intake valve.
• Which models does it fit? It is listed for Porsche 356A and Porsche 356B models.

Check fitment for your specific vehicle model, year and engine before ordering.

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

PCG54605203

The product you are viewing cross references to these numbers