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-6/-8 Check Valve Shim

Part No.: 
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Check valve shim. By shimming the spring in the idle check you can change spring pressure when the valve opens.

Shims for -6 are available in .020", .040", .095" and .190" thick. -8 comes in .020", .060", and .190" thicknesses.

Racer can pick size and thickness from drop down menu.

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