Using highly efficient ports and state-of-the-art combustion chamber shapes, Edelbrock cylinder heads offer improved performance throughout the rpm range for great throttle response and top-end horsepower. Top quality features include threaded inserts in rocker studs and exhaust bolt holes for superior strength and durability, and manganese-bronze valve guides. Cast at the Edelbrock Foundry and machined at Edelbrock's manufacturing facility in the USA, Edelbrock heads are consistently the best in quality.
* Designed for outstanding performance gains in 1965-79 389-455 c.i.d. Pontiac engines * Patterned after the 1969-70 Ram Air IV Pontiac cylinder head * 72cc version is for higher compression engines
* These Edelbrock heads are sold individually - be sure to order two for your engine.
* Combustion Chamber Volume: 72cc * Intake Runner Volume: 215cc * Exhaust Runner Volume: 175cc * Intake Valve Diameter: 2.11 in. * Exhaust Valve Diameter: 1.66 in. * Valve Stem Diameter: 11/32 in. * Valve Guide Material: Manganese bronze * Deck Thickness: 5/8 in. * Valve Spring Diameter: 1.46 in. * Valve Spring Max Lift: 0.575 in. * Rocker Arm Stud Size: 7/16-20 in. * Guideplates: Yes * Pushrod Diameter: 5/16 in.