Product updated on 2020-08-07, Air lift - AIR:52301, AirLift LoadLifter 5000 Ultimate Plus Complete Upgrade Kit, Add this part number to a LoadLifter 5000 Ultimate kit (88***) to make it an Ultimate PLUS kit (89***). Compatible with LoadLifter 5000 series air spring kits Includes stainless steel air line, roll plates, fittings, and air spring hardware., ,