1.560" Od. 0.567" Id. 0.040" Thick Hardened Steel Valve Spring Cups Springs and a removable center section

and a removable center section for cam adjustment or replacement

Impala and Buick Roadmaster

and accept most aftermarket steering wheels

These bolts are forged from aerospace alloy and heat-treated prior to thread rolling and machining

The runners are velocity stacked

1.560" Od. 0.567" Id. 0.040" Thick Hardened Steel Valve Spring Cups Springs and a removable center sectionAs 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.