1.263" Od. 0.510" Id. 0.041" Thick Hardened Steel Valve Spring Seat LS1 direct clutch failure and soft

direct clutch failure and soft slide shift complaints caused by a worn sleeve

They are quality-manufactured from stainless steel and are available in 18 to 80 oz

this high-performance oil pan is fabricated to meet the demanding needs of top fuel and alcohol applications

These Performance Automatic hardened input shafts are custom-forged from 9310 non-twist steel

to maintain accurate valvetrain adjustment

1.263" Od. 0.510" Id. 0.041" Thick Hardened Steel Valve Spring Seat LS1 direct clutch failure and softAs 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.