One owner, well maintained, L9 turbocharged 450 HP engine, Allison 3000 MH 6-speed transmission, 4.88 rear axle ratio, 15,000-lb. hitch with 7/4-pin plug, Hadley air leveling system with auxiliary air compressor, Side-mounted radiator, ABS disc brakes on front axle, drum brakes on drive and tag axle, Two-stage engine brake, Automatic traction control, Michelin 315/80R 22.5" tires (front brand new) and 295/80R 22.5" tires (rear)