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Energizer Rocker Arms Pontiac (Formerly Hi-Intensity Rocker Arms) Die Formed Aluminum Body with Needle Bearing Fulcrum and Roller Tip. Needle bearing fulcrum and roller tip reduces friction, lowers engine oil temperature, improves response, increases HP and RPM. Aerospace vacuum die-formed aluminum main body offers extreme strength and light weight. Great for street and moderate race use. Die-formed aluminum body is larger than stock, may require modifications to stock valve covers for clearance. Cannot be used with late Chevy 90° V-6 and small-block V-8 "Center Bolt" valve covers. Will not fit 90° V-6 or small-block V-8 self-aligning 88-99 heads.

Part # Description Ratio Stud Diam. Price/Set PONTIAC V-8 67-81, 265 THRU 455 WITH STRAIGHT 7/16" ROCKER ARM STUDS 28747-16 INCREASED RATIO WITH ENLARGED STUD DIAMETER ON ENGINES NOT EQUIPPED WITH 7/16" ROCKER ARM STUDS, CYLINDER HEAD MACHINING IS REQUIRED FOR THE INSTALLATION OF 99157-16 7/16" ROCKER ARM STUDS.*THIS PRODUCT IS APPLICABLE ONLY TO PRE-1966 CALIFORNIA AND PRE-1968 FEDERALLY CERTIFIED PASSENGER CARS. IT IS ALSO APPLICABLE TO NON-EMISSION CONTROLLED TRUCKS AND SIMILAR VEHICLES. IT IS NOT APPLICABLE OR INTENDED FOR USE ON ANY EMISSION CONTROLLED VEHICLES OPERATED ON HIGHWAYS OR ROADS. 1.65 7/16" $215

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