Detroit DD13 6 Cylinder 12.8 L Diesel 450 hp Engine, 2016 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Detroit DT12-DA 12-Speed Automated Transmission, 13300 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 2.47:1 Axle Ratio, 53300 lb GVWR, Air Ride Cab, 70 in High Rise Sleeper Cab, Bunk Beds, Aluminum Wheels, 275/80R22.5, Airliner Air Ride Suspension, 236 in Wheelbase, Air Sliding 5th Wheel