Cummins ISX15 6 Cylinder 15 L Ultra Low Sulfur Diesel 450 hp Engine, 25237 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller 10-Speed Manual Transmission, 13201 lb Front Axle, 38000 lb Rears, 51200 lb GVWR, Air Ride Cab, 68 in Mid Roof Sleeper Cab, Aluminum Wheels, 295/75R22.5 Front Tires, 275/80R22.5 Rear Tires, Paccar Air Ride Suspension, 254 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Dual Fuel Tanks