Detroit DD15 6 Cylinder Ultra Low Sulfur Diesel 455 hp Engine, US EPA Label, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Automated Transmission, 13300 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X4 Drive Axles, 2.64:1 Axle Ratio, 53300.0 lb GVWR, Air Ride Cab, 58 in High Rise Sleeper Cab, Bunk Beds, Bunk Heater, Aluminum Wheels, 295/75R22.5, Airliner Air Ride Suspension, 230 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks