These gaskets are matched to Edelbrock Performer Performer RPM and Victor Jr.cylinder heads and manifolds and designed to optimize performance and flow. Newmicropore synthetic fiber composite construction makes these gaskets imperviousto most c hemicals with high recovery under compression. They will conform to imperfections on sealing surfaces at lower flange pressures and include a nitrile bead around each port opening for a durable seal.Specifications:2.20x 1.18 port size0.060 thickness Made in USA
