Cummins ISX 6 Cylinder 15 L Diesel 450 hp Engine, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller RTOC-16909A 9-Speed Manual Transmission, 12350 lb Front Axle, 38000 lb Rears, Meritor MT40-14 Drive Axles, 3.55:1 Axle Ratio, 50351 lb GVWR, Air Ride Cab, 61 in High Rise Sleeper Cab, Bunk Beds, Aluminum Wheels, 295/75R22.5, Air Ride Suspension, 214 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks