Tandem Axle 58 inch Flat Top Sleeper, Full Lockers, Airleaf Suspension, ISX15 475 Horsepower, 13 Speed Transmission, Dual Air Cleaners, Dual Chrome Exhaust, 220 Gallon Fuel Capacity, Power Windows and Heated Mirrors, Air/Heat Combo, CD Player/Bluetooth/Sirius Satellite Radio, Prestige Arctic Gray Interior, White Exterior.