Superior quality and performance. Prothane Polyurethane Jeep Bushings for Jeep CJ-5, CJ-7 and CJ-8. O.E. type rubber bushings deteriorate much faster than polyurethane and give your Jeep less than perfect handling and performance. Prothane polyurethane bushings are designed to last as much as 3 times longer than standard O. E. type rubber bushings. Replace your factory Jeep rubber bushings today with Prothane polyurethane suspension bushing kits. Premium grade polyurethane components, all related sleeves, etc. are precision fabricated to assure a perfect fit.