Cummins X15 6 Cylinder 15.0 L Diesel 500 hp Engine, US EPA Label, Requires Diesel Exhaust Fluid, 100 gal Left Fuel Tank 100 gal Right Fuel Tank, Collision Mitigation System, Dual Air Seats, Power Locks, Premier interior, Sleeper Cab, 14547 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton EEO-16F112C 12 Speed Automated Transmission, 13200 lb Front Axle, 40000 lb Rears, 2.64:1 Axle Ratio, 53200 lb GVWR, Air Ride Cab, 80 in Sleeper Cab, Bunk Beds, Bunk Heater, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Low Air Leaf Air Ride Suspension, 234 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks