Detroit DD13 6 Cylinder 12.8 L Diesel 450 hp Engine, 2021 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Exhaust Brake, Detroit DT12-1650-OH Automated Transmission, 12000 lb Front Axle, 40000 lb Rears, 3.08:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, Aluminum Front Wheels, 295/75R22.5, Airliner Air Ride Suspension, 182 in Wheelbase, Air Sliding 5th Wheel