Once installed, this shackle 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 shackle bushing kit from Rugged Ridge fits 55-75 Jeep CJ5 and CJ6. Includes 2 bushings and sleeves. Enough for one shackle.