COMP Cams Ultra Pro Magnum Chromoly Roller Rocker Arm - 3/8 in Stud Mount - 1.60 Ratio - Small Block Ford (Set of 16) 1631-16 51115222 Cylinder head flow 291 cfm

Cylinder head flow 291 cfm on the intake and 217 cfm on the exhaust at

Attach to the fluid reservoir with the cap adapter

Quick Turn Tabs with 1-3/8" x

A 7 1/2 in

5/16" Insta-dapt adapter

COMP Cams Ultra Pro Magnum Chromoly Roller Rocker Arm - 3/8 in Stud Mount - 1.60 Ratio - Small Block Ford (Set of 16) 1631-16 51115222 Cylinder head flow 291 cfmComp Cams Ultra Pro Magnum Chromoly Roller Rocker Arm 3 8 in Stud Mount 1. 60 Ratio Small Block Ford (Set of 16) The Ultra Pro Magnum Roller Rocker Arms for Ford V8 289 302 351W 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 3 8" stud diameter and 1. 6 ratio. The 8650 chromemoly material and arched,