1.263" Od. 0.510" Id. 0.041" Thick Hardened Steel Valve Spring Seat LS1 Transmissions are the most essential

Transmissions are the most essential component for putting power from your engine to the wheels

The spacer is used to space out the auto starter so it will work on the toploader bellhousing

Some applications feature a thicker deck to solve common warping or cracking issues

This gives you the ability to run a much stronger and reliable transmission to your high performance engine

These Speedmaster fuel pumps feature an improved design for street and strip applications

1.263" Od. 0.510" Id. 0.041" Thick Hardened Steel Valve Spring Seat LS1 Transmissions are the most essentialAs 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.