Once installed, this red front 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.. This red polyurethane front sway bar bushing kit from Prothane fits 97-06 Jeep Wrangler with a 30.5mm sway bar diameter.