Air Lift 88399 LoadLifter 5000 Ultimate Air Spring Kit for 2017-2024 Ford Super

Vehicle Fitment

• 2017-2019 Ford F-250 Super Duty (4WD, Single & Dual Rear Wheel)
• 2017-2019 Ford F-350 Super Duty (4WD, Single & Dual Rear Wheel)
• 2017-2024 Ford F-450 Super Duty (4WD, Single & Dual Rear Wheel)

Features

• Air Lift LoadLifter 5000 Ultimate air spring helper kit for rear leaf suspension
• Internal closed-cell urethane foam jounce bumper built into air springs
• Provides up to 5,000 lb load-leveling capacity for towing and hauling
• Adjustable from 5 to 100 PSI to dial in ride height and load support
• Dual-bellow air springs built with reinforced, durable 2-ply fabric
• Includes all mounting brackets, roll plates, fittings, air line, and hardware
• Air springs safely operated at zero PSI thanks to internal bumpers
• Lifetime limited warranty with 60-day satisfaction guarantee

Specifications

• Part Number: 88399
• Kit Type: LoadLifter 5000 ULTIMATE rear air spring kit
• Load Leveling Capacity: Up to 5,000 lb
• Air Pressure Range: ~5-100 PSI
• Air Spring Type: Dual-bellow with internal jounce bumper
• Installation Location: Rear suspension (leaf spring mounts)
• Fitment Notes: Fits in-bed hitch and many side-mount fifth wheel hitch applications; not for cab & chassis models
• warranty: Limited Lifetime with 60-day return policy

Included Components

• 2x Dual-bellow air springs with internal jounce bumpers
• 2x Air line assemblies
• 2x Schrader inflation valves
• Air lines, fittings, and hardware kit
• Mounting brackets and roll plates
• Illustrated installation guide

Product Description

The Air Lift 88399 LoadLifter 5000 Ultimate Air Spring Kit is a heavy-duty rear suspension helper spring system engineered for Ford Super Duty trucks equipped with leaf springs - specifically 2017-2019 F-250 and F-350 models, and 2017-2024 F-450 Super Duty 4WD variants. This kit enhances load-leveling and ride comfort when towing, hauling, or carrying heavy loads by providing up to 5,000 lb of adjustable support while keeping the vehicle level under varying loads.

Featuring closed-cell internal jounce bumpers inside each air spring, the LoadLifter 5000 Ultimate kit absorbs shocks and prevents harsh bottoming out even when the system is at zero air pressure. The air springs are fully adjustable from approximately 5 to 100 PSI, allowing you to customize ride height and stiffness based on load conditions. With reinforced dual-bellow construction and comprehensive mounting hardware included, this kit installs on the rear leaf springs to improve stability, reduce body sag, and maintain braking and steering control under load. A limited lifetime warranty and 60-day satisfaction guarantee support long-term reliability and performance.