COMP Cams Rockers CB 1.6 7/16in Ultra Pro 1826-12

The next design evolution of the Hi-Tech Stainless Steel Roller Rocker Arms are built to outlast and outperform in accuracy and strength. The Ultra Pro Magnum XD Rocker Arms are engineered from durable 8650 steel and include a machined billet pushrod seat insert for a wide range of super accurate ratios. A unique and wide ratio range to fit almost any popular application. These XD rockers are fully rebuildable and boast precision-sorted needle bearings and hardened roller tips. And they work with most diameter springs and retainers. The new XD design utilizes advanced FEA and CAD design and development to improve strength, stiffness and MOI optimization for drag and circle track applications. COMP Cams Ultra Pro Magnum XD Roller Rocker Arms, 1.6 Ratio, 7/16" Stud Diameter for Big Block Chevrolet, Set of 12 For Big Block Chevrolet applications, 1.6 ratio, 7/16" stud; Machined billet pushrod seat insert; 8650 steel construction outlasts and outperforms other rockers in accuracy and strength; Ultra Pro Magnum XD Rocker Arm bodies are guaranteed against breakage for life; Fits, Fitments 1965 Chevrolet Biscayne Base 1966 Chevrolet Biscayne Base 1967 Chevrolet Biscayne Base 1968 Chevrolet Biscayne Base 1969 Chevrolet Biscayne Base 1970 Chevrolet Caprice Base 1970 Chevrolet Monte Carlo Base 1971 Chevrolet Caprice Base 1971 Chevrolet Monte Carlo Base 1972 Chevrolet Caprice Base 1972 Chevrolet Monte Carlo Base 1973 Chevrolet Caprice Classic 1973 Chevrolet Caprice Estate 1973 Chevrolet Malibu Base 1973 Chevrolet Malibu Estate 1973 Chevrolet Monte Carlo Base 1973 Chevrolet Monte Carlo Landau 1973 Chevrolet Monte Carlo S 1974 Chevrolet Caprice Classic 1974 Chevrolet Caprice Estate 1974 Chevrolet Malibu Base 1974 Chevrolet Malibu Classic 1974 Chevrolet Malibu Estate 1974 Chevrolet Monte Carlo Base 1974 Chevrolet Monte Carlo Landau 1975 Chevrolet Caprice Classic 1975 Chevrolet Caprice Classic Sport 1975 Chevrolet Caprice Estate Wagon 1975 Chevrolet Malibu Classic 1975 Chevrolet Monte Carlo S 1976 Chevrolet Caprice Classic 1976 Chevrolet Caprice Classic Estate 1976 Chevrolet Caprice Classic Landau 1976 Chevrolet Caprice Classic Sport