1.640" Od .710" Id .040" Thick Hardened Steel Valve Spring Cups Ps8005 Springs These drives fit under your

These drives fit under your stock timing cover and come complete with instructions

Speedmaster safety loops surround the driveshaft with a heavy-gauge steel cage that restrains the shaft after a failure

and high grade nuts

which consists of a tilt lever

1.640" Od .710" Id .040" Thick Hardened Steel Valve Spring Cups Ps8005 Springs These drives fit under yourAs 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.