1.560" Od. 0.567" Id. 0.040" Thick Hardened Steel Valve Spring Cups Springs These headers are designed with

These headers are designed with 5/16 in

Speedmaster single Keyway Double Row Timing Chain Kits are CNC Machined from billet

Leaks can lead to the death of your rear end

You can simply connect one wire from the alternator to the battery

1.560" Od. 0.567" Id. 0.040" Thick Hardened Steel Valve Spring Cups Springs These headers are designed withAs with all other parts in the valvetrain, the area where the spring sits takes a beating. The old standard shims simply will not hold up to the extreme pressures and high rpm found in today's performance engines. Speedmaster offers this set of valve spring shims to solve this problem and eliminate failures.