Upgrade your factory rubber sway bar bushings to these high-quality polyurethane bushings for the ultimate in ride control. On and off-road driving can be brutal on your Wrangler suspension components polyurethane bushings offer improved deflection for a more stable ride. Kit contains 31mm sway bar bushings, end link bushings, sleeves, washers, and grease. Molded of RED polyurethane.. This polyurethane rear 19 mm sway bar and end link bushing kit from Prothane fits 07-18 Jeep Wrangler JK/JKU.