COMP Cams Magnum Chromoly Roller Tip Rocker Arm - 10 mm Stud Mount - 1.60 Ratio - GM V6 (Set of 12) RS200120 What can my Xtreme Accu-Tach

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COMP Cams Magnum Chromoly Roller Tip Rocker Arm - 10 mm Stud Mount - 1.60 Ratio - GM V6 (Set of 12) RS200120 What can my Xtreme Accu-TachThese Magnum Roller Rocker Arms for Chevy 173 V6 applications are the ultimate street rocker. With a 10mm stud diameter and 1. 6 ratio, they are designed for serious performance enthusiasts. All Magnum Roller Rocker Arms are constructed from 8620 chromemoly steel, which is a superior material that will not flex and assures maximum lift. Their roller tip reduces friction, while stiff design and superior ratio accuracy yield more effective valve lift.