MSD - MSD RPM Module/Chip Tester Valve Lock - Super Locks

Valve Lock - Super Locks - 10 Degree - 3/8 in Valve Stem - Standard Height - Lash Cap Recess - Steel - Black Oxide - Set of 16

560 in Shank Diameter - 2

54 in ID - Rubber / Aluminum - Blue Anodized - Universal - Each

Water Pump - Mechanical - Victor Series - 5/8 in Pilot - Long Design - Aluminum - Polished - Big Block Chevy - Each

Coil-Over Shock Kit - Pro-Coil - Twintube - Double Adjustable - 175 lb/in Spring Rate - Rear - GM A-Body 1964-72 - Pair

MSD - MSD RPM Module/Chip Tester Valve Lock - Super LocksIf you're using an MSD ignition box or rpm module, you need to have one of these rpm checkers. Each tester operates on a single 9 V battery and is simple to use; you just plug it into your MSD ignition box or rpm module and hold down the buttonthat's it. MSD rpm module testers are essential for any racing class with rpm limitations.