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This planetary gear is fully Rollerized
Upgrade your transmission with the Speedmaster heavy-duty forward clutch hub
They are engineered to be "where the oil is" under the most demanding racing conditions
Designed to work with PCE628
with these Speedmaster polished aluminum differential covers
1.550" Od. 0.567" Id. 0.060" Thick Hardened Steel Valve Spring Seat Springs This planetary gear is fullyAs 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.
