714-660-3433 ... New pair of Edelbrock 6089 Perfommer RPM cylinder heads for small block Chevy. These have 202 160 stainless steel valves, 185 cc intake runners, 64 cc chambers, screw in studs with guide plates, and springs setup for .575 lift cams. These are straight plug. Heads are brand new and never used. Ready to bolt on and go.