07-18 Wrangler JK, 4-Door;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;On & Off-Road performance;Tuned lift springs;Stainless steel brake lines;High clearance control arm mounts;Chromoly track bar;Chromoly drag link;Front & rear Mono-Tube shocks;Rubicon Express lifetime advantage warranty;California Residents: WARNING The latest addition to the Rubicon Express JK suspension offering is our complete 4-LINK Extreme-Duty Long Arm system. 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 competitors 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, 4.5 and 5.5 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.