LoadLifter 5000 UltimateT Rear Air Spring Kit (88228) by Air Lift®. Quantity: Sold as a Kit. With Internal Jounce Bumper. Set of two adjustable secondary air helper springs designed to add up to 5,000 pounds of leveling capacity for vehicles with leaf springs. Spring add ride comfort and restores proper handling and safety to 1-ton pickups, motor homes. Air pressure in the springs can be manually adjusted between 5 and 100 psi. Working with your existing suspension, air springs increase your safety and comfort when towing and hauling heavy loads. CA Prop 65 WARNING - This product contains chemicals known to the State of California to cause cancer, and/or birth defects or other reproductive harm.