Cummins ISX15 15 L Ultra Low Sulfur Diesel 450 hp Engine, 2014 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Automatic Transmission, 13200 lb Front Axle, 40000 lb Rears, 53200 lb GVWR, Air Ride Cab, 56 in High Rise Sleeper Cab, Aluminum Outer Wheels, 295/75R22.5, Air Ride Suspension, 213 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks