High quality polyurethane bushings to replace worn out OEM rubber bushings in 94-02 Dodge Cummins isolators.  These will also replace the bushings in our HD 12v isolators and 2wd Cummins motor mounting kit isolators.  Standard bushings are a very stiff, heavy duty replacement intended for high performance applications, choose the soft durometer bushing option for much less vibrations and a factory feel.