This kit comes complete with the upper and lower a-arms for airbags, bushings, ball joints, cross shafts, and weld-in gussets are all included. The arms are narrowed 5/8" per side, to give extra clearance for wider wheels and or tires! Also featured is a mounting point for a sway bay. These work great with most aftermarket crossmembers, stock M2 cross members may require modifications.