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exhaust valve Genuine Porsche part 93010541951

Code: 93010541951

Genuine Porsche part

exhaust valve

The product code 93010541951 was also found on these diagrams

103-00 - exhaust valve

cylinder head 911 1978-83

103-00 - exhaust valve

cylinder head 911 1987-89

103-00 - exhaust valve

Cylinder head 911 1984-86

103-00 - exhaust valve

Cylinder head cylinder with piston 911 1974-77

Additional information:

• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.

Before purchasing thoroughly check part to confirm compatibility.

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Engine cylinder head exhaust valve. Porsche 911 1978-89

93010541951/1

Product Information

Engine cylinder head exhaust valve. Diameter - 41.5mm
Sold each.

High-quality replacement valve designed for classic Porsche 911 engines produced between 1978 and 1989.

Fits:

Porsche Carrera 3.0ltr - 1976 to 1977
Porsche 911 SC 3.0ltr - 1978 to 1983
Porsche 911 3.2 Carrera 1984 to 1989

Diagram Ref No 10.

The exhaust valve is located in the cylinder head as part of the engine’s valve train. With every combustion cycle, it opens to release exhaust gases and closes again to preserve compression. Built to endure extreme heat, pressure, and constant motion, it plays a vital role in maintaining engine performance, efficiency, and emissions control.

Over time, exhaust valves can wear or deform due to heat, carbon deposits, or mechanical stress. When they no longer seal properly, exhaust pressure can leak past the valve seat, reducing compression, power, and efficiency. In severe cases, a failing exhaust valve can lead to misfires, rough running, or damage to the cylinder head.

You should consider replacing the exhaust valve if any of the following occur:
•  Loss of engine power, especially at higher RPMs
•  Rough idle or misfires
•  Exhaust smoke or unusual noise from the cylinder head
•  Compression test reveals a weak cylinder
•  When rebuilding or overhauling the engine or cylinder head
•  After excessive heat exposure or in engines with high mileage

Replacing the valve ensures precise fit, proper sealing, and long-term durability — critical for restoring engine performance and preventing further damage.

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Related, superseded, cross reference or alternative numbers for comparison.

93010541951

93010541908

93010541915

93010541951

93010541902

93010541918

The product you are viewing cross references to these numbers

Engine cylinder head inlet valve. Porsche 911 3.0L / 3.2L 1974-89

93010540901/1

Product Information

Engine cylinder head inlet valve.
Manufactured to OEM specifications, this valve matches the factory dimensions, seat angle, and stem diameter for perfect sealing and valve timing accuracy. Built from high-grade heat-resistant steel, it delivers excellent thermal stability and wear resistance, ideal for the demanding environment of Porsche’s high-revving flat-six engines.

Fits:

Porsche Carrera 3.0ltr - 1976 to 1977
Porsche 911 SC 3.0ltr - 1978 to 1983
Porsche 911 3.2 Carrera - 1983 to 1989

Valve head diameter 49,00 mm
Valve stem diameter 9,00 mm
Length 110,10 mm
Valve seat angle 45 °

Diagram Ref No 9.

Function:
The inlet valve controls the flow of air-fuel mixture into the combustion chamber. Proper sealing and timing are essential for maintaining compression, combustion efficiency, and overall power output. A high-quality OE Match valve ensures consistent intake airflow, reliable operation, and long engine life.

Why & When Replacement Matters

Why: Over time, inlet valves experience wear from heat, carbon build up, and mechanical stress, which can lead to reduced compression, power loss, and rough engine operation.
When: During engine rebuilds or cylinder head servicing If there are signs of valve leakage, pitting, or stem wear. When experiencing loss of power, misfires, or compression imbalance. As preventive maintenance on high-mileage engines or performance builds.

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

93010540901

93010540913

93010540901

93010540900

93010540901

93010540913

The product you are viewing cross references to these numbers

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exhaust valve Genuine Porsche part 93010541951