Cummins ISX 6 Cylinder Diesel Engine, Cruise Control, Power Windows, Engine Brake, Eaton Endurant E Automated Transmission, 12350 lb Front Axle, 40000 lb Rears, Paccar Drive Axles, 2.79:1 Axle Ratio, 50350 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, Bunk Heater, Aluminum Wheels, 295/75R22.5, Air Ride Suspension, 230 in Wheelbase, Dual Fuel Tanks