Air Lift Ride Control Air Spring Kits use air sleeves that mount between your spring and frame to compensate for heavy loads. They're ideal for hauling boats, travel trailers, and jet skis, for towing motorcycle and snowmobile trailers, and for vehicles equipped with snowplows. The average installation time is about two hours. They are mounted without modification and handle loads up to 2,000 lbs. These kits include air sleeves, lines, brackets, hardware, and instructions and are available for most popular Chevy, GMC, Dodge, and Ford trucks.