Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 455 hp Engine, 2012 US EPA Label, Requires Diesel Exhaust Fluid, 24409 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FM-15E310B-LAS 10-Speed Automated Transmission, 12000 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 2.47:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, Bunk Heater, Aluminum Wheels, 275/80R22.5 Front Tires, 445/50R22.5 Super Singles Rear Tires, Airliner Air Ride Suspension, 255 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks