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Designed for the Ram 2500 trucks equipped with factory coil spring rear air suspension (also available for factory air suspension trucks), the Kelderman 3″ Lift Kit replaces the standard coil springs with a 4-Link Rear Air Suspension Lift Kit to get your Ram up in the air. Optional air control packages allow you to control the height of your Ram with the push of a button. The Kelderman 3″ lift kits are capable of lowering to roughly 1″ below stock height and can inflate up to a 7″ lift. Operating at the designated 3″ lifted ride height will allow you to maintain a smooth, comfortable ride you expect with air suspension, but giving you the aggressive looks these trucks are missing. Your Ram isn’t your only toy, right? You’ve got stuff that you put in the back of this thing and don’t want it to squat under a load. Coil springs just can’t handle the weight. With a Kelderman Air Suspension System, you are able to add additional air pressure to the suspension and level out the truck with the push of a button (air controls required). What’s the point in having a truck that has its headlights pointed at the sky as soon as you hook up to your trailer? Get rid of all your trouble towing with a Kelderman Air Suspension System. This 3″ Lift Kit should allow you to pull most gooseneck trailers too! 35″ tires are recommended for this suspension. Kit includes upper and lower airbag mounts, industrial-strength airbags, adjustable trailing arms, adjustable panhard bar with heim ends, panhard bar mount, brake line relocation bracket, upgraded rear sway bar, sway bar end links, and sway bar end link mounts. The standard version of the kit includes the necessary amount of air line, fittings, and Schrader valves to inflate the suspension like you would a tire. Air control systems sold separately.