1.640" Od .710" Id .040" Thick Hardened Steel Valve Spring Cups Ps8005 Springs This upgraded combination elevates the

This upgraded combination elevates the standard in electronic fuel injection

this pulley is designed to provide superior durability and efficiency

6 pinion gear

That's just what our Speedmaster guideplate sets do

1.640" Od .710" Id .040" Thick Hardened Steel Valve Spring Cups Ps8005 Springs This upgraded combination elevates theAs 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.