Air Lift LoadLifter 5000 Ultimate Plus air spring kits feature all the benefits of the Ultimate LoadLifter 5000, plus high-quality, long-lasting stainless steel components. The roll plates, air spring hardware, and braided air lines are all stainless steel, adding protection, durability, and strength. The Ultimate Plus models also feature an internal jounce bumper. This inside-the-air-spring design absorbs shock and can be safely run with zero air pressure. The kits include military-grade AN fittings that simply thread together for a metal-to-metal seal, ensuring an easy-to-install, leak-free system with no air line cutting required. For an unrivaled combination of leveling, adjustability, and ride quality, Air Lift LoadLifter 5000 Ultimate Plus air spring kits won't let you down.