Engine cylinder head exhaust valve. Porsche 911 1970-77

Engine cylinder head exhaust valve.  Diameter - 40mm.
This is a high-quality replacement exhaust valve manufactured to OEM specifications, used in air-cooled 911 engines.

Fits:
Porsche 911 T / E / S 2.2ltr - 1970 to 1971
Porsche 911 T / E / S 2.4ltr - 1972 to 1973
Porsche 911 / S 2.7ltr - 1974 to 1977
Porsche 911 2.7 Carrera - 1974 to 1976

Diagram Ref No 10.

The exhaust valve plays a critical role in controlling the flow of burned gases from the combustion chamber into the exhaust system. It opens and closes with precise timing, maintaining proper engine breathing, power output, and efficiency. This OE Match valve is engineered to withstand high temperatures and pressures, ensuring consistent sealing and smooth exhaust flow under demanding conditions.

Over time, exhaust valves endure extreme heat and wear that can cause pitting, burning, or warping. A worn valve can lead to compression loss, reduced performance, increased emissions, or even engine damage. Replacing it with an OE Match exhaust valve restores proper sealing, maintains cylinder compression, and ensures smooth, efficient engine operation.

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Related, superseded, cross reference or alternative numbers for comparison.

91110541550

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