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-6/-8 Check Valve Shim

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Check valve shim. By shimming the spring in the idle check you can change spring pressure when the valve opens. These nozzle bodies can be ordered long or short. Please specify length when ordering. Shims for -6 are available in .020", .040", .095" and .190" thick. -8 comes in .020", .060", and .190" thicknesses.