This direct-fit rear upper control arm adds strength, on-car adjustability and articulation flexibility to your stock-height or lifted Wrangler. It features SPC s xAxis™ sealed flex joint receiver at the frame end to provide bind-free twist during off-road articulation and an OE rubber bushing on the axle end to reduce NVH (Noise Vibration Harshness). D.O.M steel construction and a forged link provide the strength required for large tires and aggressive gearing. The dual-threaded adjuster and jam nuts make rear pinion angle adjustments quick and easy without the need to disconnect the arm.