1.560" Od. 0.567" Id. 0.040" Thick Hardened Steel Valve Spring Cups Springs Speedmaster planetary gear sets are

Speedmaster planetary gear sets are ideal for modern big-displacement engines

Leaks can lead to the death of your rear end

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

intake gaskets

Throttle linkage kits make your carb installation look clean and professional

1.560" Od. 0.567" Id. 0.040" Thick Hardened Steel Valve Spring Cups Springs Speedmaster planetary gear sets areAs 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.