− Decrease quantity for Rocker Arms, Ultra Pro Magnum, Full Roller, Chromoly Steel, Black Oxide, 1.7 Ratio, 3/8 in. Stud Mounting, Chevrolet, 348/409 Big Block W, Set of 8 Quantity + Increase quantity for Rocker Arms, Ultra Pro Magnum, Full Roller, Chromoly Steel, Black Oxide, 1.7 Ratio, 3/8 in. Stud Mounting, Chevrolet, 348/409 Big Block W, Set of 8 Add to cart