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Engineered to achieve optimum performance on Mercury Verado engines. STR Lower Shims work to reduce the play and tighten the tolerance used by factory for OEM shims. The additional support from STR shim help does this by reducing engine movement while at speed. They are tapered on both ends to match OEM thickness to maintain compatibility & fitment on all Verado engines with NO modifications.
Kit includes shims & hardware for ONE engine.