Cummins ISX15 6 Cylinder Diesel 550 hp Engine, 2015 US EPA Label, Requires Diesel Exhaust Fluid, 16662 Engine hrs, Air Conditioner, Cruise Control, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, Differential Lock, 20000 lb Front Axle, 45400 lb Rears, 4.10:1 Axle Ratio, 85399 lb GVWR, Air Ride Cab, 28 in Flat Top Sleeper Cab, Aluminum Wheels, 425/65R22.5 Front Tires, 285/75-24.5 Rear Tires, Air Lift Pusher Axle, Dual Steering Boxes, Neway Air Ride Suspension, 275 in Wheelbase, PTO, Wet Kit, Double Frame, Air Sliding 5th Wheel, Headache Rack, Dual Fuel Tanks