The Air Lift 57389 LoadLifter 5000 Kit is built to handle the toughest jobs with massive support and adjustability, whether hauling heavy cargo or towing trailers. Its leaf-spring design integrates seamlessly with your suspension, restoring balance and control as the load grows. When you're towing heavy loads, the LoadLifter 5000 Air Springs deliver up to 5, 000 lbs. of load-leveling capacity* to keep your vehicle level, stable, and capable. Engineered for 1/2, 3/4, and 1-ton trucks and vans with leaf springs, this kit reduces sag and bottoming out for safer, smoother rides.• Up to 5, 000 lbs. of load-leveling capacity*• Air Springs are fully adjustable from 5-100 PSI for precise control• Designed for vehicles with leaf-spring suspensions• Includes roll plates to protect the air springs from damage• Levels your vehicle when towing or hauling for a safe, comfortable ride• Eliminates sag and bottoming out• Easy to install with included instructions• Underframe kit designed to work with most in-bed hitches* Do not exceed the vehicle's gross vehicle weight rating (GVWR).FITMENTtable, th, td {border: 1px solid black; border-collapse: collapse;}th {text-align: left;}th {padding-left: 4px;}td {padding-left: 4px;} Year Make Model Trim Drive 2021-2026 Ford F-150 Pickup PowerBoost 4-Wheel DriveNOTE: Frame drilling required for installation with a frame-side mounted hitch. Fully adjustable from 5-100 PSI for a stable, level ride loaded or unloaded Underframe kit designed to work with most in-bed hitches Easy to install with included instructions | Air Lift LoadLifter 5000 Air Spring Kit, '21-'26 Ford F-150 Powerboost