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They are engineered to be "where the oil is" under the most demanding racing conditions
circuit racing and made to withstand extreme use
These Performance Automatic hardened input shafts are custom-forged from 9310 non-twist steel
Upgrade your transmission with the Speedmaster heavy-duty forward clutch hub
The right choice is critical for your engine and your wallet--choose Speedmaster iron distributor gears
1.550" Od. 0.567" Id. 0.060" Thick Hardened Steel Valve Spring Seat Springs They are engineered to beAs 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.
