Suspension Load Leveling Kit All-In-One Wireless Kit All-In-One Wireless Kit; Incl. Air Springs; Compressor; Air Accessories; All Components For Install; SPECIFICATIONS: Position: Rear FEATURES: All-In-One Kits Includes All Components For Install Combines Air Spring Kit And Air Accessory Kit One Part Number For Easy Ordering Discounted Overall Price Recommended No-Drill Air Accessory Mounting Kit The Firestone 2500 will allow you to control four springs independently and wirelessly! Firestone air accessory systems provide an instant air source for all air suspension products, including Coil-Rite, Ride-Rite, and Sport-Rite Air Bags. Simply flip a switch and adjust the ride for various loading conditions. The wireless air system by Firestone will come complete with a standard duty compressor as well as all of the air lines and fittings you will need to be on your way to wireless air inflation. One of the advantages that people love about the wireless system is that you can get out of the cab and view your ride height. 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.