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This Performer RPM cylinder head is designed for outstanding performance gains in 1962-77 389-455 c.i.d. Pontiac engines. They are patterned after the 1969-70 Ram Air IV Pontiac cylinder head. This head has 72cc combustion chambers for higher compression engines and is perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. This cylinder head delivers great throttle response and power from 1500 to 6500 rpm. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using.
Tech Specs Deck Thickness: 0.625 in Deck Height: 10.250 in Intake Runner Volume: 215cc Exhaust Runner Volume: 175cc Combustion Chamber Volume: 72cc Valve Angle: 14 degrees Seat Angle: Exhaust 45 deg/Intake 45 deg Guide Plate Material: Hardened Steel Pushrod diameter: 5/16" (width of slot in guide plate). Drilled and tapped for 7/16-14 Rocker stud
RESTOPARTS® Branded Parts