COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.50 Ratio - Small Block Chevy (Set of 16) H764C35 supple feel and feature multi-needle

supple feel and feature multi-needle

1996-2005 Ford Explorer

Four 1/2 in Spacers

including EV8-Z18

Peak Velocity Pick Off Testing/Graphing (PVP)

COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.50 Ratio - Small Block Chevy (Set of 16) H764C35 supple feel and feature multi-needleThe 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