Description
Power From 1500-6500 RPMBolt-on readyThe 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 SpecsDeck Thickness: 0.625 inDeck Height: 10.250 inIntake Runner Volume: 215ccExhaust Runner Volume: 175ccCombustion Chamber Volume: 72 or 87ccValve Angle: 14 degreesIntake Valve Diameter: 2.11 inExhaust Valve Diameter: 1.66 inSeat Angle: Exhaust 45 deg/Intake 45 degGuide Plate Material: Hardened SteelPushrod Diameter: 5/16Rocker Stud Diameter: 7/16-14
