Made and reinforced with premium-quality material, Cometic head gaskets are designed to seal combustion pressure in the cylinders and minimize blowby. They can also withstand extreme temperatures and are unaffected by oil or coolant. The gasket is a critical component of the engine and is one of the first components replaced after a rebuild, so invest in quality parts when you need gaskets for your car. The unique features help create an excellent sealing surface across multiple applications with exceptional heat resistance. These series features Cometic r50 r52 r53 cylinder head gasket 0.51 inch and Cometic r56 n14 n18 Cylinder head gasket.