Single axle booster, 2 pairs of chain pockets per side for lifting booster, premium center landing gear, rebound limiters, 4 airbag custom suspension, CMVSS, FMVSS code air and electrical, 4" Bumper mounted Strobes, Control Box Lighting, Manual Shimming, Pin on lug 38" center, 20" pin couple, 1.5" pin, Vertical hinge steering with axle lift for back up.