7/16" Stud, 1.6 Ratio

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The Ultra Pro Magnumâ„¢ Roller Rocker Arms for Chevy V8 265-400 c.i.d. (SBC) Applications 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. These Rocker arms feature a 7/16" Stud diameter and 1.6 ratio. 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.

• Investment 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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Application Summary:

Year	Make/Model
1977-1980	Buick Century
1991-1993	Buick Commercial Chassis
1978	Buick LeSabre
1977-1980	Buick Regal
1991-1993	Buick Roadmaster
1977-1979	Buick Skylark
1990-1992	Cadillac Brougham
1992-1993	Cadillac Commercial Chassis
1980	Cadillac Eldorado
1993	Cadillac Fleetwood
1980	Cadillac Seville
1975-1982	Checker Marathon
1955-1975	Chevrolet Bel Air
1958-1972	Chevrolet Biscayne
1969-1974	Chevrolet Blazer
1987-1994	Chevrolet Blazer
1969-1972	Chevrolet Brookwood
1975-1986	Chevrolet C10
1961-1974	Chevrolet C10 Pickup
1968-1986	Chevrolet C10 Suburban
1988-1995	Chevrolet C1500
1992-1995	Chevrolet C1500 Suburban
1975-1986	Chevrolet C20
1961-1974	Chevrolet C20 Pickup
1968-1986	Chevrolet C20 Suburban
1988-1995	Chevrolet C2500
1992-1995	Chevrolet C2500 Suburban
1975-1986	Chevrolet C30
1961-1974	Chevrolet C30 Pickup
1988-1995	Chevrolet C3500
1967-1992	Chevrolet Camaro
1966-1996	Chevrolet Caprice
1964-1973	Chevrolet Chevelle
1963-1968	Chevrolet Chevy II
1955-1972	Chevrolet Corvette
1974-1982	Chevrolet Corvette
1984-1991	Chevrolet Corvette
1958	Chevrolet Del Ray
1959-1960	Chevrolet El Camino
1964-1987	Chevrolet El Camino
1975-1995	Chevrolet G10
1968-1974	Chevrolet G10 Van
1975-1995	Chevrolet G20
1968-1974	Chevrolet G20 Van
1975-1996	Chevrolet G30
1970-1974	Chevrolet G30 Van
1959-1985	Chevrolet Impala
1975-1986	Chevrolet K10
1961-1974	Chevrolet K10 Pickup
1968-1986	Chevrolet K10 Suburban
1988-1995	Chevrolet K1500
1992-1995	Chevrolet K1500 Suburban
1975-1986	Chevrolet K20
1961-1974	Chevrolet K20 Pickup
1968-1986	Chevrolet K20 Suburban
1988-1995	Chevrolet K2500
1992-1995	Chevrolet K2500 Suburban
1977-1986	Chevrolet K30
1968-1974	Chevrolet K30 Pickup
1988-1995	Chevrolet K3500
1975-1986	Chevrolet K5 Blazer
1969-1972	Chevrolet Kingswood
1973-1976	Chevrolet Laguna
1964-1967	Chevrolet Malibu
1973-1983	Chevrolet Malibu
1970-1988	Chevrolet Monte Carlo
1976-1979	Chevrolet Monza
1969-1979	Chevrolet Nova