Polyurethane is designed to last. It doesn't rot or deteriorate from oils, road salt, chemicals or atmospheric contaminates such as ozone or smog. That means our bushings will not deteriorate and cause mushy, uncertain responses when driving. Our components make a drastic improvement in the way your Jeep handles. Kit includes only the body mount bushings. There are no bolts included. *These kits will not work with fiberglass bodies. 14 piece kit.