Detroit DD13 14.8 L Ultra Low Sulfur Diesel 450 hp Engine, Requires Diesel Exhaust Fluid, 22119 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Detroit DT12 12-Speed Automated Transmission, 12000 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X4 Drive Axles, 3.08:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, Aluminum Wheels, 275/80R22.5 Front Tires, 445/50R22.5 Super Singles Rear Tires, Airliner Air Ride Suspension, 174 in Wheelbase, Dual Fuel Tanks