COMP Cams Ultra Pro Magnum Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.60 Ratio - Small Block Chevy (Set of 16) 11-694-8 The ignition

The ignition

Our Pro version valve features a more durable piston style design

Spline Mount Center

Fine Spline

COMP Cams Ultra Pro Magnum Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.60 Ratio - Small Block Chevy (Set of 16) 11-694-8 The ignitionThe Ultra Pro Magnum Roller Rocker Arms for Chevy V8 265 400 applications not only live up to the lofty standards of the original Pro Magnums, but they also take stud mount rocker performance, stability and value to a whole new level. These rocker arms feature a 7 16" stud diameter and 1. 6 ratio. The 8650 chromemoly material and arched, web like design deliver increased strength and rigidity while still reducing the moment of inertia and optimizing