LoadLifter 5000 ULTIMATE adjustable air spring kits feature all of the benefits of our heaviest rated air spring with the addition of an internal jounce bumper inside the spring for the ultimate in ride comfort. An Air Lift exclusive product! Fits vehicles with in-bed hitches.Tow and haul the heaviest loads with safety and comfort with LoadLifter 5000 ULTIMATE. Works with vehicle's leaf springs to provide up to 5,000 lbs. of rear load leveling capacity and keeps the vehicle riding stable, level and comfortable whether loaded or unloaded. Fully adjustable from 5 to 100 PSI.The closed-cell urethane foam jounce bumper inside the ULTIMATE air springs provide a cushion of air that absorbs shock, eliminates harsh jarring on rough roads and protects vehicles carrying heavy loads. Never bottom out again with the ULTIMATE!LoadLifter 5000 ULTIMATE air springs are maintenance free! Safely run with zero air pressure because of the internal jounce bumper. Replaces factory jounce bumper that is sometimes removed when adding air springs.Easy to install in less than 2 hours. Requires no drilling into frame!Includes industry-exclusive 60 Day No Questions Money Back Guarantee! Includes the most comprehensive Lifetime Warranty in the industry, covers all kit contents including brackets, fittings and air line.Air springs are built like a tire and are reinforced by durable, 2-ply fabric for maximum strength.Exclusive upper and lower roll plates included. Protect the springs from sharp edges, such as brackets or the frame. They increase load capacity up to 10%.The kit includes 2 air springs, brackets, air lines, Schrader valve and all of the hardware needed for installation. Includes fully illustrated instruction manual.Add an Air Lift on-board air compressor system to inflate and deflate air springs with the touch of a button from inside or outside of the vehicle.Air Lift is a 3rd generation family owned company that has been manufacturing the highest quality suspension products.