Cummins ISX 12 G 400 14.0 L Liquid Propane Gas (LPG) 400 hp Engine, 2014 US EPA Label, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FO-16E313A-MHP ULT 13-Speed Automated Transmission, Triple Differential Locks, 13200 lb Front Axle, 40000 lb Rears, 4.43:1 Axle Ratio, 53200 lb GVWR, Air Ride Cab, Aluminum Wheels, 11R24.5 Front Tires, 11R24.5 Rear Tires, Airglide Air Ride Suspension, 236 in Wheelbase, PTO, Air Sliding 5th Wheel, Dual Fuel Tanks