Detroit 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 505 hp Engine, 2013 US EPA Label, CARB Compliant, Requires Diesel Exhaust Fluid, 12518 Engine hrs, Engine Brake, Eaton Fuller 13-Speed Manual Transmission, Differential Lock, 13220 lb Front Axle, 40000 lb Rears, 53220 lb GVWR, Air Ride Cab, Aluminum Wheels, 11R24.5, Airliner Air Ride Suspension, 230 in Wheelbase, PTO, Air Sliding 5th Wheel