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All the factory flaws redesigned to be eliminated
That latter characteristic translates into increased ground
Finished in satin aluminium
like lower cost steel ones
1.263" Od. 0.510" Id. 0.041" Thick Hardened Steel Valve Spring Seat LS1 All the factory flaws redesignedAs 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.
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