1.263" Od. 0.510" Id. 0.041" Thick Hardened Steel Valve Spring Seat LS1 A new transmission filter along

A new transmission filter along with a fluid change can extend the life of a transmission

These protect your engine investment by returning your timing back to the desired specifications

look no further than PCE

Speedmaster one piece silicone rear main seal

All the factory flaws redesigned to be eliminated

1.263" Od. 0.510" Id. 0.041" Thick Hardened Steel Valve Spring Seat LS1 A new transmission filter alongAs 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.