FIRESTONE AIR COMMAND II. Dual Electric Air Suspension Air Compressor Kit. Level Command II Standard Duty Air Compressor System. Dual Electric Air Command Standard Duty Air Compressor System; Incl. /Pneumatic Switch; Compressor; Inflates Each Spring Individually. Provides Front To Rear/Side To Side Leveling. Leveling Through The Use Of An Electric Switch. Inflates Two Bags Individually. Perfect for off-center loads such as slide-in campers, this electric, dual-gauge control in your cab levels one set of springs independently or two pairs equally with the flick of a switch. Kit includes a standard-duty compressor with 130 max psi. More than seventy years ago, Firestone started developing a full air-based suspension for passenger cars. Firestone Airide air springs were installed on the new line of general Motors buses in the late 50’s. Later that decade, air springs began to gain popularity in luxury vehicles. Over the next 20 years, technology improvements in other suspension components, such as compressors and valves, helped support the growth of air suspension. In the 1970’s, Ford Motor Company incorporated air suspension in the Lincoln Town Car and Continental. Firestone has continued to be innovative in product design, material selection and customer service, providing our customers with improved ride quality and safe load-carrying capabilities.