PRO COMP/HEADER CHEVY STAINLESS STEEL ROLLER 1.5 X 3/8 ROCKER ARMSCALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. PC2326 PCE261. 1198 PM001 302269412941 New Super Duty Series Stainless rocker arms for your small block Chevy. They are 1. 5 ratio and for standard 3 8 rocker studs. Extra large trunnions with sleeve bearings to reduce wear are standard, along with a Jumbo roller pin for up to 600lbs. of open spring pressure. There is only one rocker arm pictured, but you will get the Complete Set of 16 Rocker arms and