Firestone Dual Automatic Air Command System. Dual Automatic Air Command System. Suspension Air Compressor Kit. Dual Automatic Air Command System; Inflates Both Air Helper Springs Individually. WARNING CA Proposition 65: No. Uses Height Control Valve. Mounts Between The Chassis And Suspension. Inflates Two Bags Individually. These Firestone dual automatic air command system kits inflate both air helper springs individually. Gain total control over your air springs by picking up a Firestone dual automatic air command system kit. 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.