COMP Cams Rockers CS 1.55 3/8in Ultra Pro

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.
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Year	Make	Model	Submodel
1986-1990	Chevrolet	Caprice	Base
1985-1990,1993	Chevrolet	Caprice	Classic
1986-1988	Chevrolet	Caprice	Classic Brougham
1987-1988	Chevrolet	Caprice	Classic LS Brougham
1985	Chevrolet	Impala	Base
1978-1979	Chevrolet	Malibu	Base
1978-1979	Chevrolet	Malibu	Classic
1978-1979	Chevrolet	Malibu	Classic Landau
1979	Chevrolet	Malibu	Classic Sport
1979	Chevrolet	Malibu	Landau
1979	Chevrolet	Malibu	Police
1979	Chevrolet	Malibu	Sport
1979,1985-1988	Chevrolet	Monte Carlo	Base
1978-1979	Chevrolet	Monte Carlo	Landau
1986-1988	Chevrolet	Monte Carlo	LS
1978	Chevrolet	Monte Carlo	Sport
1986	Pontiac	Bonneville	Base
1986	Pontiac	Bonneville	Brougham
1986	Pontiac	Bonneville	LE
1986-1987	Pontiac	Grand Prix	Base
1986-1987	Pontiac	Grand Prix	Brougham
1986-1987	Pontiac	Grand Prix	LE
1985-1986	Pontiac	Parisienne	Base
1985-1986	Pontiac	Parisienne	Brougham