COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.70 Ratio - Big Block Chevy (Set of 16) Running Boards Truck Steps & Components This is Kirkey's most advanced

This is Kirkey's most advanced seat

Reinforced side panels protect high-abrasion areas

Sealing Rings

1996-2010 Chevrolet Express 1500

Aluminum spacers properly space and align pulleys when used with a 1/8" keyed mandrel

COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.70 Ratio - Big Block Chevy (Set of 16) Running Boards Truck Steps & Components This is Kirkey's most advancedThe 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