This valve is from the engine section in the Rolls-Royce & Bentley parts catalogues for models built between 1946 to 1955.
Exhaust valves are the ones most likely to burn because they run hotter than the intakes. The intake valves are cooled by the incoming air and fuel, and consequently operate at lower temperatures than exhaust valves. Exhaust valves, on the other hand, receive little such cooling and are blasted by the hot combustion gases as they exit through the exhaust port. Exhaust valves run at a much higher temperature, which makes them much more vulnerable to erosion and burning than intakes.
All our parts branded Prestige Parts have a 3 year warranty.