Cylinder Head, Performer RPM, 1962-77 Pontiac 389-455, CNC Chamber 72cc Hyd Rllr

Power From 1500-6500 RPM

Bolt-on ready

The Edelbrock Performer RPM cylinder head is designed for outstanding performance gains in 1962-77 389-455 Pontiac engines. They are patterned after the 1969-70 Ram Air IV Pontiac cylinder head. This cylinder head delivers great throttle response and power from 1500 to 6500 rpm. The complete heads are assembled with stainless steel, one-piece swirl-polished 2.11" intake and 1.66" exhaust valves with under-cut stems to promote better flow for more power. Includes 2-ring positive oil control seals, rocker studs and guideplates, valve springs for either hydraulic roller or hydraulic flat tappet lifters, steel retainers and keepers. Heads include bronze guides, hardened valve seats and the deck surface is 5/8" thick. Available in 72 or 87cc combustion chambers "as cast" or CNC machined. 12 Month Warranty.

Tech Specs Deck Thickness: 0.625 in Deck Height: 10.250 in Intake Runner Volume: 215cc Exhaust Runner Volume: 175cc Combustion Chamber Volume: 72 or 87cc Valve Angle: 14 degrees Intake Valve Diameter: 2.11 in Exhaust Valve Diameter: 1.66 in Seat Angle: Exhaust 45 deg/Intake 45 deg Guide Plate Material: Hardened Steel Pushrod Diameter: 5/16 Rocker Stud Diameter: 7/16-14