Cummins ISX 6 Cylinder 15.0 L Diesel 450 kW Engine, 2008 US EPA Label, Engine Brake, Eaton Fuller 10-Speed Manual Transmission, 12350 lb Front Axle, 40000 lb Rears, 52350 lb GVWR, Air Ride Cab, 295/75R22.5, Air Ride Suspension, 180 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks