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superior corrosion resistance
Proper fuel pressure is critical for adjusting your carburetor or fuel injection
These Speedmaster fuel pumps feature an improved design for street and strip applications
The spacer is used to space out the auto starter so it will work on the toploader bellhousing
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 superior corrosion resistanceAs 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.
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