Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 505 hp Engine, 2018 US EPA Label, CARB Compliant, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Detroit DT12-1650-OH1 HD 12-Speed Automated Transmission, 12350 lb Front Axle, 40000 lb Rears, Detroit DA-RT-40.0-4 Drive Axles, 3.08:1 Axle Ratio, 52350 lb GVWR, Air Ride Cab, 60 in High Rise Sleeper Cab, Bunk Beds, Aluminum Outer Wheels, 295/75R22.5, Airliner Air Ride Suspension, 229 in Wheelbase, Dual Fuel Tanks