JKS sent us a set of their adjustable control arms, track bars, coil retainer plates, and rear track bar mount reinforcement bracket. The control arms utilize greaseable brass bearings for smooth, reliable operation and excellent longevity. Fine pitch adjustment threads ensure superior strength and allow over 3 inches of adjustment. New OE rubber bushings are used to isolate road noise and vibrations without over-stressing the mounting brackets. Finally, a durable powdercoat finish and zinc plating provide excellent corrosion protection.The track bars are adjustable and use OE rubber bushings for superior vibration resistance. This will keep the JK Explorer noise, clunk, and vibration free on road and trail.