COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.60 Ratio - Small Block Ford (Set of 16) Overflow Reservoir 600'' exhaust valves with AFR's

600'' exhaust valves with AFR's iron ductile interlocking valve seats

Strange 4 Piston

Dual Bolt Pattern

hot rods and racing/competition vehicles - yet designed to be also used for street vehicles

Essential for Drivers

COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.60 Ratio - Small Block Ford (Set of 16) Overflow Reservoir 600'' exhaust valves with AFR'sThe 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