I have noticed several members have added air bags to their trucks. Air lift and Firestone both list bags for 2500 series trucks which I understand our frames to be. Both companies offer kits that require no drilling (they use the rubber jounce mounting holes). Does anyone have any experience with either one of these? When I hook up my boat the rear end lowers a little over 2 inches which is okay but I would feel better if the bags keeps the ride at the factory level .