MSD - Quick easy components to lock out timing on GM HEI distributors. Coil Spring - Conventional -

Coil Spring - Conventional - 5 in OD - 12 in Length - 225 lb/in Spring Rate - Black Powder Coat - Each

performance Signature Series sound

2A/5 - FIA Approved - Double Layer - Fire Retardant Cotton - Black / Yellow - Size 56 - Large - Each

Coil-Over Shock Kit - RCX Series - Twintube - Double Adjustable - 450 lb/in Spring Rate - Front - GM A-Body 1973-77 / G-Body 1978-88 / X-Body 1975-79 - Pair

Vehicle Scale - SW777 - Electric - 15 in Square - 1500 lb Capacity Pad - Bluetooth / Wireless - Aluminum - Natural - Kit

MSD - Quick easy components to lock out timing on GM HEI distributors. Coil Spring - Conventional -MSD offers two kits to make locking out mechanical and vacuum timing advance in HEI distributors an easy task for Circle track racers. No more welding a tac on the mechanical advance weights or trying to find a way to keep the vacuum advance from moving once the canister is removed.