The Edelbrock #60509 Performer RPM cylinder heads are 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.
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The Edelbrock #60509 Performer RPM 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. The Edelbrock #60509 Performer RPM head with the 72cc combustion chamber are for higher compression engines. Performer RPM #60509 is semi-machined and must be finished by a professional cylinder head porter. They include valve guides and seats installed with no intake pushrod holes.
WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.
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.; These heads require Ram Air IV (round port) style exhaust manifolds or headers; Edelbrock head bolt kit #8549; Deck thickness: 5/8"; Rocker stud diameter: 7/16"; Pushrod diameter: 5/16" (width of slot in guide plate).