Cummins ISX15 400ST 6 Cylinder 15.0 L Diesel 400 hp Engine, 2013 US EPA Label, Requires Diesel Exhaust Fluid, 16027 Engine hrs, Engine Brake, Eaton Fuller 10-Speed Manual Transmission, 12350 lb Front Axle, 40000 lb Rears, 52350 lb GVWR, Air Ride Cab, 68 in Mid Roof Sleeper Cab, Thermo King TriPac Evolution Auxiliary Power Unit, Aluminum Wheels, 295/75R22.5, Paccar Air Ride Suspension, 234 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks