Edelbrock designed this 61529 Performer RPM CNC Cylinder Head for 1962-79 389-455 CID V8 Pontiac engines. It features CNC profiled intake and exhaust runners, as well as fully CNC’d 87cc combustion chambers. The CNC machined chamber results in a consistent as well as precise chamber for improved flow performance. Fully threaded inserts for the rocker studs and exhaust manifold bolt holes deliver strength as well as durability, and the machined valve cover rail produces an optimum gasket sealing surface. Optimized oil return passages provide increased oil flow. This complete cylinder head includes guide plates, rocker studs, springs for hydraulic roller cams, bronze valve guides, hardened seats as well as high-quality stainless steel valves for direct bolt-on application. Edelbrock 61529 Pontiac 455 Performer RPM Performer Cylinder Head Features: Combustion Chamber Volume: 87cc Intake Runner Volume: 215cc Exhaust Runner Volume: 175cc Exhaust Port Shape: Ram Air IV Intake Valve Diameter: 2.110 in. Exhaust Valve Diameter: 1.660 in. Maximum Valve Lift: 0.575 in. Camshaft Style: Flat Tappet Outside Diameter of Outer Spring: 1.460 in. Deck Thickness: 0.625 in. Deck Height: 10.250 in. Rocker Stud Diameter: 0.4375 in. Pushrod Diameter: (Suggested) 0.3125 in. Sold Individually Notes: Requires Edelbrock head bolt kit 8549 as well as Ram Air IV (round port) style exhaust manifolds or headers for installation. The Edelbrock name has been a staple of the automotive performance industry since the 1940’s. Their product line includes virtually everything under the hood, from individual components to complete engines. This makes Edelbrock one of the most recognized and trusted brands in the racing and performance world!
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