COMP Cams Ultra Pro Magnum Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.52 Ratio - Small Block Chevy / GM V6 UNI-MAG 1958-1963 Alvis TD21

1958-1963 Alvis TD21

716 in OD x 1

F-250 1959-1957

It has none of the disadvantages of the crown type kits by being one unit

042 in Stud

COMP Cams Ultra Pro Magnum Chromoly Roller Rocker Arm - 7/16 in Stud Mount - 1.52 Ratio - Small Block Chevy / GM V6 UNI-MAG 1958-1963 Alvis TD21The Ultra Pro Magnum Roller Rocker Arms for Chevy V8 265 400 applications take stud mount rocker performance, stability and value to a whole new level. These rocker arms feature a 7 16" stud diameter and 1. 52 ratio. The 8650 chromemoly material and arched, web like design deliver increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. A unique black oxide exterior finish helps prevent corrosion