Detroit DD13 6 Cylinder 12.8 L Diesel 500 hp Engine, 2012 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Engine Brake, Eaton Fuller 10-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, MB Drive Axles, 52000 lb GVWR, Air Ride Cab, 295/75R22.5, Airliner Air Ride Suspension, 179 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks