Left and Right Rear Upper Control Arms for lifted vehicles. Off-car adjustable for pinion angle correction, suits lifted vehicles up to 4". This trailing arm kit for the Jeep Wrangler JK & JL is designed to correct the pinion angle on a lifted vehicle. Offering an adjustable solution, while improving both on and offroad performance. Supplied as a complete kit and fully assembled withSuperPro bushings. Can be used as a standalone upgrade or together with our HD adjustable rear lower control arms and HD adjustable front arms for a complete upgrade Fitted with SuperPro bushes, these suspension arms have been optimized for longevity, durability and performance without any unwanted NVH. Fully tested and developed by our Australian based R&D team.