07-Current Wrangler JK, 4-Door;3.5 inch lift height;4-link long arm system;Progressive coils;Chromoly upper and lower control arms;Adjustable control arms;Super-flex sperical ball joints;PT-meg super-ride bushings;Full width transmission crossmember;No welding required for installation;California Residents: WARNING The latest addition to the Rubicon Express JK suspension offering is our complete 4-link front/rear 3-link extreme-duty long arm system with progressive coils. These high-performance suspension systems deliver both performance and control that are unmatched by any other long arm kit on the market. They feature adjustable chromoly upper and lower control arms that will stand up to anything you can drive over. With PT-MEG super-ride bushings and super-flex joints they are sure to provide superior handing while not limiting articulation.
The kits full width heavy-duty transmission crossmember allows for more durability and frame rigidity then the competition. This also allows for installation that is much easier that competitor's kits eliminating the need for welding. An optional robust belly pan, and CNC machine steering knuckle provide outstanding upgrades. Systems can be ordered in 3.5 inch, 4.5 inch and 5.5 inch lift heights with optional high performance monotube shocks. Like all Rubicon Express systems, they are made in the USA and backed by the Rubicon Express advantage lifetime warranty.
Progressive coils have a longer extended length vs. Linear coils, maximizing droop travel. The progressive spring rate also results in a smooth ride over small bumps with enough spring rate to prevent harsh bottoming during full compression.