JKS Manufacturing Jeep Wrangler TJ/LJ Adjustable J-Flex Lower Control Arms - RearUpgrade your Jeep TJ or LJ Wranglers performance and reliability with JKS J Flex adjustable rear lower control arms. CNC bent from stout DOM tubing, the fully adjustable design allows you to fine tune suspension geometry. The ends are also fully rebuildable and greaseable. With heavy duty 1 1 4" 12 threads and hex shaped weld in bungs, tightening of the included jam nuts is super easy and secure. At the non adjustable end, factory style rubber