Scorpion (1084) 1.5/1.6 Ratio x 3/8 Stud Roller Rocker Arm for Small Block Chevy Rocker Arm - 3/8 in Stud Mount - 1.50 / 1.60 Ratio - Full Roller - Narrow Body - Self-Align - Aluminum - Blue Anodize - Small Block Chevy - Set of 16