The Air Lift 57396 LoadLifter 5000 Helper Spring Kit is specifically engineered for the rear of your 2011-2016 Ford F-250/350/450 Pickup while towing and hauling your heaviest loads with full-time load support. These tough, durable air springs provide up to 5,000 pounds of leveling capacity and are fully adjustable to keep your vehicle riding stable, level and comfortable whether loaded or unloaded.