Engine valves are crucial components in internal combustion engines, controlling the flow of air and fuel into the combustion chamber and the expulsion of exhaust gases. They play a vital role in the engine's performance, efficiency, and overall operation.

Valve guides are made from grey cast iron alloy. The structure of valve guides has good wear resistance. Grey cast iron with high phosphorous content gives high wear resistance or corrosion resistance and improved running properties even in poor lubrication conditions.