Cummins X15 6 Cylinder 15.0 L Diesel 450 hp Engine, 2023 US EPA Label, Requires Diesel Exhaust Fluid, Engine Brake, Automated Transmission, 12350 lb Front Axle, 40000 lb Rears, 52350 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, Aluminum Outer Wheels, 295/75R22.5, Air Ride Suspension, 232 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks