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

Get genuine Speedmaster stainless steel valves

and high grade nuts

Designed for precision fitment and easy installation

and cable--no modifications are required for installation

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.