1.370" Od. 0.760" Id. 0.040" Thick Hardened Steel Valve Spring Cups Springs Speedmaster makes it easy with

Speedmaster makes it easy with these cap and rotor replacement kits

which can be easily installed in any stock hose or metal fuel line

but it is near impossible to break

Speedmaster throttle position sensors will keep your engine running reliably by properly monitoring throttle angle

1.370" Od. 0.760" Id. 0.040" Thick Hardened Steel Valve Spring Cups Springs Speedmaster makes it easy 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.