GM Gen III/LS1/LS6 1.85:1 Pro-Magnum Rocker Arm Kit with 3/8" Flat guide plates. Kit Includes: 1.85 Pro-Magnum Rocker arms (#1370-16), 3/8 Flat Guide plates for 3/8 pushrods (#4856-8), 3/8 Rocker Studs (#4554-16), 3/8 adjusting nut (#4654-16), and Set screw for 4654 (#465SS-16) |