COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.70 Ratio - Big Block Chevy MT-KRX-MM-RDM up to 1000 HP depending

up to 1000 HP depending on application

1972-1974 Jeep DJ5

Another major change to this new unit is that the box itself has a controller as well as a wireless infrared remote control

Will not fit 1987 and later engines

Fairlane (Canadian)

COMP Cams Ultra Pro Magnum XD Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.70 Ratio - Big Block Chevy MT-KRX-MM-RDM up to 1000 HP dependingThe 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