Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 505 hp Engine, 2023 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Automated Transmission, 12350 lb Front Axle, 40000 lb Rears, 52350 lb GVWR, Air Ride Cab, 60 in High Rise Sleeper Cab, Bunk Beds, Aluminum Wheels, 275/80R22.5 Front Tires, 275/80R22.5 Rear Tires, Air Ride Suspension, Air Sliding 5th Wheel, Dual Fuel Tanks