Firestone Ride-Rite 2400 Ride-Rite Air Helper Spring Kit. Ride-Rite Air Helper Spring Kit.Ride-Rite Air Helper Spring Kit; Rear; Incl. Brackets; Air Helper Springs; Hardware; Air Line; And Inflation Valves; No Drilling Required; Number W217602400. Air Adjustments Improves The Ride. 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 fo 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 incorprated air suspension in the Lincoln Town Car and Continental. Firestone has continued to be innovative in product design, material selection and customer service, prviding our customers with improved ride quality and safe load-carrying capabilities. This item is in the category "eBay Motors\Parts & Accessories\Performance & Racing Parts\Auto Performance Parts\Chassis, Suspension & Brakes\Lift Kits & Parts". The seller is "tiresave" and is located in this country: US. This item can be shipped to United States, Canada.