Air Lift 88284 LoadLifter 5000 Ultimate Air Spring Kit LoadLifter 5000 ULTIMATE works with your vehicle's leaf springs to provide up to 5,000 lbs. of load leveling capacity* and keeps the vehicle riding stable, level and comfortable whether loaded or unloaded. 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. 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.