Cylinder Head, Performer RPM, 1962-77 Pontiac 389-455, 72cc, Bare, Semi-finished

Pontiac 389-455 Performer RPM 72cc Cylinder Head by Edelbrock®

Aluminum Performer RPM head uses a 72cc chamber for Pontiac 389-455 performance combinations.

Edelbrock® Performer RPM Pro Port bare cylinder head is designed for outstanding performance gains in 1962-79 389-455 c.i.d. Pontiac engines. They are patterned after the 1969-70 Ram Air IV Pontiac cylinder head and have 215cc intake ports 175cc exhaust ports and 72cc combustion chambers. These heads are semi-machined with valve guides and seats installed, but must be finished by a professional cylinder head porter. Sold individually.

Additional Technical Specifications • Deck Thickness: 0.625 in • Deck Height: 10.250 in • Intake Runner Volume: 215cc • Exhaust Runner Volume: 175cc • Combustion Chamber Volume: possible 72cc • Valve Angle: 14 degrees • Suggested Intake Valve Diameter: 2.11 in • Suggested Exhaust Valve Diameter: 1.46 in. x 1.40 in • Seat Angle: Exhaust 45 deg/Intake 45 deg • Pushrod Diameter: 5/16" • Drilled and tapped for 7/16-14 Rocker stud