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The right choice is critical for your engine and your wallet--choose Speedmaster iron distributor gears
They are made from stamped steel and feature a chrome plated finish for good looks and durability
Designed to work with PCE628
with these Speedmaster polished aluminum differential covers
This offers strength and no thrusting while torque is applied
1.550" Od. 0.567" Id. 0.060" Thick Hardened Steel Valve Spring Seat Springs The right choice is criticalAs 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.
