COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.73 Ratio - Big Block Ford / Cleveland / Modified Fender Brace It is formulated using a

It is formulated using a combination of Group IV/V synthetic base oil chemistries and additive technologies providing high shear resistance and 4-5 times the film strength of conventional oils

1978-1983 Ford Fairmont

Needs lower gears

Return Spring

COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.73 Ratio - Big Block Ford / Cleveland / Modified Fender Brace It is formulated using aThe 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