COMP Cams Ultra Pro Magnum Chromoly / Steel Roller Rocker Arm - 3/8 in Stud Mount - 1.80 Ratio - GM LS-Series 91619059 Experts agree that good HEI

Experts agree that good HEI ignition systems rely on a good module and a good coil

18 x 23 x 32 in Trapezoid

Control arm braces are manufactured from DOM steel

Precision Tolerances - The Tightest in the Industry

Ford FE Engines

COMP Cams Ultra Pro Magnum Chromoly / Steel Roller Rocker Arm - 3/8 in Stud Mount - 1.80 Ratio - GM LS-Series 91619059 Experts agree that good HEIConvert your LS1 engine to an adjustable valvetrain with the Ultra Pro Magnum Rocker Kit. Our kit includes 1. 8 Ultra Pro Magnum Rockers, guideplates, 3 8" studs, adjusting nuts and set screws for a complete adjustable valvetrain solution. COMP Cams Ultra Pro Magnum Roller Rocker Arm Kit, 1. 8 Ratio, 3 8" Stud Diameter, LS1 LS6 Product Description: Rocker Arm Ultra Pro Magnum 3 8 in Stud Mount 1. 80 Ratio Full Roller Chromoly Steel GM LS Series For 30