COMP Cams Rocker Arms 1403B-1 COMP Cams Pivot Balls are a good upgrade for stock components. These are replacement pivot balls for COMP Cams Magnum Roller Tip Rocker Arms. Replacement Pivot Ball for Magnum Rockers w/ 10mm Stud COMP Cams Replacement Pivot Ball for Magnum Rocker Arms, 10mm Stud, Single Piece COMP Cams Rocker Arm Ball CSV-6 H-E