Detroit DD13 12.8 L Ultra Low Sulfur Diesel 450 hp Engine, US EPA Label, Requires Diesel Exhaust Fluid, 16735 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FRW-15210B 10-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 2.47:1 Axle Ratio, Air Ride Cab, 60 in Mid Roof Sleeper Cab, Carrier Auxiliary Power Unit, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Air Ride Suspension, 232 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks