Enhance your Wrangler TJ, LJ, or Cherokee XJ Jeep with JKS J-Flex adjustable front upper Control Arms. CNC-bent from DOM tubing for proper tire, frame and axle mount clearance, these front upper control arms feature forged flex ends that are adjustable. The design increases reliability and allows you to fine tune arm length. The ends are also fully rebuildable and greaseable. With heavy duty 1/4 inch -12 threads and hex shaped weld-in threaded bung, tightening of the included jam nuts is super easy and secure. At the non-adjustable end, the bolt-on mount is boxed inch for increased strength. Arms are powdercoat for a long-lasting finish. Adjustable arm design utilizing a forged adjustable flex end and jam nut. Improved caster and axle positioning on 0-4 inch lifts using the factory mounting locations Features: Forged end is fully rebuildable and greaseable. 1 inch - 14 threads provide ultimate strength and fine-tune adjustability. Factory style rubber bushings at the non-adjustable ends for quite, maintenance-free operation. CNC formed for proper tire, frame and axle mount clearance. Includes class 10.9 replacement hardware for axle mounting point. 3-sided inch boxedinch clevis design provides maximum strength over standard U-shaped clevis.