Once installed, this red 5/8 inch rear sway bar bushing kit provides better handling and control of your Wrangler for a better overall performance. They are made of polyurethane which is a stronger replacement than rubber and lasts for as long as you need it! Bolt-on application for a direct fit and easy installation.. This red polyurethane rear sway bar bushing kit from Prothane fits 84-01 Jeep Cherokee XJ with a 5/8 inch sway bar diameter.