Replaces stock track bar on JK 2 doors and 4 doors with 3.5 and up lift heights. The track bar is designed specifically for the JK to give maximum clearance between steering components and re-center the front axle after installation of lift, it is adjustable in length. The track bar is made from 1 3/8 X 3/16 wall 4130 chromolly while our Extreme-Duty tack bar is made from 1 3/8 X 1/4 wall and uses our smaller Super-Flex joint on one end for maximum articulation.