Mr. Gasket Performance intake gaskets are manufactured from cellulose/nitrile composition gasket material. They provide excellent sealing and durability. Can be trimmed if necessary for modified port applications. For OE replacement, high performance street, drag race and oval track. Includes gaskets for the TPI intake runners where they attach at the lower intake manifold base and at the plenum, plus the gasket for the throttle body. Does not include the intake manifold to cylinder head gaskets.