Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 505 hp Engine, 2019 US EPA Label, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Automated Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, Air Ride Cab, 60 in High Rise Sleeper Cab, Aluminum Wheels, 275/80R22.5 Front Tires, 275/80R22.5 Rear Tires, Airliner Air Ride Suspension, 234 in Wheelbase, Air Sliding 5th Wheel