These direct - fit, stock - legth rear lower control arms add strength and articulation flexibility to your stock - height or 'lifted' Wrangler. They feature SPC's xAxis sealed flex joints at one end to provide bind - free 'twist' between the frame and axle during off - road articulation. The main tube is 316 wall round DOM steel to provide strength to handle large tires, low gearing, and big horsepower. California Residents WARNING