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

while giving accurate measurements on your oil capacity

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

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

Oxygen sensors are vital components that help you adjust to your engine's fuel/air ratio via the electronic control unit (ECU)

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.