The LoadLifter 7500 XL Ultimate offers support for the heaviest tows with an internal jounce bumper, absorbing shock for the smoothest ride. Air Lift’s fully adjustable, industry-leading air springs are the perfect upgrade for your vehicle, eliminating any issues you might face when towing and hauling. With Air Lift’s LoadLifter 7500 XL Ultimate and the added stability that air springs provide, you can haul safely, knowing that you have optimal braking and steering control. The kit offers up to 7,500 lbs. load-leveling capacity while eliminating squat, trailer sway, body roll and bottoming out for select Ford F-250, F-350, four-wheel drive, and select Ford F-450 non-commercial chassis, four-wheel drive. The LoadLifter 7500 XL Ultimate kit is set apart by a pair of massive 7-inch, double-convoluted bellows air springs. The larger air springs allow for better leveling abilities at lower air pressures than similar systems, keeping your cargo safe and secure while ensuring a more comfortable ride. The closed-cell urethane foam jounce bumper inside the air spring provides a cushion of air that absorbs shock, eliminates harsh jarring on rough roads, and protects vehicles carrying heavy loads. All end caps are made with an ultra-high-strength nylon composite formula, strong as steel but much lighter and corrosion-proof. The air springs are built like tires, reinforced with 2-ply fabric for maximum strength. With the added stability that air springs provide, you can haul safely, knowing that you have optimal braking and steering control. The LoadLifter 7500 XL Ultimate’s air springs are maintenance-free, can run safely on zero air pressure, and are fully adjustable from 5-100 PSI for precise control. Do not exceed the vehicle's gross vehicle weight rating (GVWR).