Designed for TJ owners who already have a Rubicon Express Super-Flex short arm suspension system, these kits allow you to upgrade to the Extreme-Duty Long Arm System. Our Extreme-Duty Long Arm System will provide noticeable improvements in your TJ’s on road handling, returning a nearly stock ride quality. Off road you will see unmatched performance on the most extreme trails. These upgrade systems include a three-piece belly pan for easy transfer case and transmission access; rear stainless steel brake lines abd the chromoly Rubicon Express Extreme-Duty Long Arms. Lift heights depends on the system you are upgrading. Rubicon’s Long Arm Tri-Link system eliminates the rear track bar, allowing for true up/down wheel travel, while enhancing anti-squat for those steep climbs. On-road tracking is improved, and the kit is bolt-on for factory Dana 35 and Dana 44 rear ends. Kit includes front and rear control arms using 2 .250 wall, 4130 chromoly material. Also included with the kit is Rubicon’s newest misalignment joint design, the Builder Ball. This setup eliminates the rear track bar and has up to 32 degrees of misalignment in a giant-sized 3″ OD housing.