COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.70 Ratio - Big Block Chevy 4x4 Driveline Components All Holley jets are sized

All Holley jets are sized by actual flow and may vary from sizes above

Console can be Trimmed for Custom Fit

Our 1¾-27 Spline Quick Change Sprocket Carrier is CNC machined from 7075 Aluminum for extra strength and weighs in at

1/4 to 1-3/4 in Wide Solid Stock

COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.70 Ratio - Big Block Chevy 4x4 Driveline Components All Holley jets are sizedThe 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