1.263" Od. 0.510" Id. 0.041" Thick Hardened Steel Valve Spring Seat LS1 Injectors come complete and ready

Injectors come complete and ready for installation with precision molded o-rings and fine-mesh fuel strainers

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

superior corrosion resistance

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 Injectors come complete and readyAs 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.