Ultra Pro Magnumâ„¢ Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnums but they also take Stud mount Rocker performance, stability and value to a whole new level. The 8650 chromemoly material and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. A unique black oxide exterior finish helps prevent corrosion and increases durability. Featuring Oversized trunnions, precision-sorted needle bearings and hardened Roller tips for the ultimate in performance and dependability. Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.Chevy V8 396-454 c.i.d. - 7/16" Stud - 1.7 RatioInvestment cast 8650 chromemoly body and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia. Unique black oxide exterior finish helps prevent corrosion and increases durability.Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.Feature Oversized trunnions, precision-sorted needle bearings and hardened Roller tips.Lifetime Warranty - So strong that we guarantee the Rocker bodies against breakage for life. For use with up to 850 lbs of open spring pressure.
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This Part Fits:

Year	Make	Model	Submodel
1970-1975	Chevrolet	Bel Air	Base
1975-1981	Chevrolet	C20	Cheyenne
1981-1986	Chevrolet	C20	Custom
1975-1980	Chevrolet	C20	Custom Deluxe
1981	Chevrolet	C20	Deluxe
1975-1986	Chevrolet	C20	Scottsdale
1975-1986	Chevrolet	C20	Silverado
1970-1974	Chevrolet	C20 Suburban	Base
1981-1986	Chevrolet	C20 Suburban	Custom
1975-1980	Chevrolet	C20 Suburban	Custom Deluxe
1981	Chevrolet	C20 Suburban	Deluxe
1975-1980,1982,1984-1986	Chevrolet	C20 Suburban	Scottsdale
1975-1977,1979-1980,1982-1986	Chevrolet	C20 Suburban	Silverado
1973-1974	Chevrolet	C30 Pickup	Base
1967	Chevrolet	Camaro	Base
1967	Chevrolet	Camaro	RS
1967-1969	Chevrolet	Camaro	SS
1966-1969	Chevrolet	Caprice	Base
1973	Chevrolet	Chevelle	Laguna
1973	Chevrolet	Chevelle	Laguna Estate
1974-1975	Chevrolet	Chevelle	Laguna Type S-3
1970-1971	Chevrolet	K30 Pickup	Base
1989	Chevrolet	V3500	Cheyenne
1989	Chevrolet	V3500	Scottsdale
1989	Chevrolet	V3500	Silverado
1968-1969	GMC	C15/C1500 Pickup	Base
1975-1978	GMC	C25	Base
1975-1978	GMC	C25	High Sierra
1975-1978	GMC	C25	Sierra Classic
1975-1978	GMC	C25	Sierra Grande
1968	GMC	K25/K2500 Suburban	Base
1971-1972,1974-1975	GMC	Sprint	Base
1975	GMC	Sprint	Classic
1972,1974	GMC	Sprint	Custom
1975	GMC	Sprint	High Sierra
1975	GMC	Sprint	SP