Air Lift – LoadLifter 5000 Rear Air Spring Kit – 2017–2024 Ford Super Duty 4WD – 57399

The Air Lift LoadLifter 5000 Air Spring Kit (57399) is designed to improve towing and hauling performance on Ford Super Duty trucks, delivering up to 5,000 lbs. of load-leveling capacity. Built for durability and adjustability, this rear air spring kit helps eliminate squat, reduce trailer sway, improve ride quality, and prevent bottoming out when carrying heavy loads.

With fully adjustable air pressure from 5–100 PSI, the LoadLifter 5000 allows you to fine-tune ride height whether loaded or unloaded, providing a stable and controlled driving experience. This system is ideal for frequent towing, work trucks, and heavy payload applications, helping reduce strain on factory suspension components while maintaining proper vehicle stance.

Installation is bolt-on with no drilling required, and the kit is compatible with factory in-bed hitch systems and most side-mount fifth wheel hitch applications, making it a versatile solution for work and towing setups.

Key Features

• Up to 5,000 lbs. of load-leveling capacity*
• Reduces squat, trailer sway, rough ride, and bottoming out
• Fully adjustable air pressure from 5–100 PSI
• Improves towing stability and ride comfort
• Helps reduce strain on factory suspension
• Designed for demanding towing and hauling applications
• No drilling required for installation
• Rear air spring kit

Fitment

Fits the following vehicles:

• 2017–2024 Ford F-250 Super Duty 4WD (SRW & DRW)

• 2017–2024 Ford F-350 Super Duty 4WD (SRW & DRW)

• 2017–2024 Ford F-450 Super Duty 4WD

Fitment Notes:

• Fits ALL models without a fifth-wheel hitch

• Compatible with factory in-bed hitch systems

• Compatible with most side-mount fifth wheel hitch applications

• Does NOT fit cab & chassis applications

Specifications

• Part Number: 57399

• Series: LoadLifter 5000

• Application Type: Rear Kit

• Load-Leveling Capacity: Up to 5,000 lbs.*

• Replacement Air Spring: 50293

• Drilling Required: No

Dimensions & Weight:

• Weight: 34.8 lb

• Width: 14.125 in

• Depth: 9.25 in

• Height: 10.75 in

*Load-leveling capacity is based on air spring system capacity and does not increase GVWR.