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Edelbrock has the New Performer RPM CNC head for 1962-79 389-455 c.i.d. Pontiac engines features CNC machined combustion chambers for improved flow performance just the way Marken Performance likes it. Available in two chamber sizes: 87cc & 72cc. Both are patterned after the same port flange configuration as the 1969-1970 Ram-Air IV Pontiac cylinder head.
Performer RPM CNC cylinder heads have the same specifications as our popular Performer RPM cylinder heads for 1962-79 389-455 c.i.d. Pontiac engines, but feature a CNC machined combustion chamber. The CNC machined chamber results in a consistent and precise chamber for improved flow performance. Performer RPM CNC cylinder heads are available in two chamber sizes. The 87cc chamber version is ideal for 9.5:1 engines and will deliver excellent street performance on low octane fuel. Performer RPM CNC cylinder heads with 72cc chambers are best for higher compression engines. Both are patterned after the same port flange configuration as the 1969-1970 Ram-Air IV Pontiac cylinder head.
Equipped With Springs For Use In Hydraulic Roller Camshaft Applications:
Performer RPM CNC (87cc) # 61525 ea
Performer RPM CNC (72cc) # 61515 ea
Equipped With Springs For Use In Hydraulic Flat Tappet Camshaft Applications:
Performer RPM CNC (87cc) # 61529 ea
Performer RPM CNC (72cc) # 61519 ea
Edelbrock INSTALLATION NOTE:
These heads require Ram Air IV (round port) style exhaust manifolds or headers and Edelbrock head bolt kit #8549. Match with Edelbrock complete head gasket set #7382. Deck thickness: 5/8", rocker stud diameter: 7/16", pushrod diameter: 5/16" (width of slot in guide plate).
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