Cummins ISX15 6 Cylinder 15 L Ultra Low Sulfur Diesel 450 hp Engine, 2016 US EPA Label, Requires Diesel Exhaust Fluid, 19049 Engine hrs, Engine Brake, Automated Transmission, 13200 lb Front Axle, 40000 lb Rears, 53200.0 lb GVWR, Air Ride Cab, 72 in Mid Roof Sleeper Cab, Bunk Beds, Aluminum Wheels, 295/75R22.5 Front Tires, 445/50R22.5 Super Singles Rear Tires, Hendrickson Air Ride Suspension, 226 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks