The Air Lift 57399 LoadLifter 5000 is a rear air spring kit for the 2017–2019 Ford F-250 / F-350 Super Duty 4WD and 2017–2026 F-450 4WD pickups. It adds adjustable load support so the vehicle stays level and stable when towing or hauling, and you set the air pressure to match the load.

Features & Benefits

• Up to 5,000 lbs. of load-leveling capacity*
• Eliminates squat, trailer sway, rough ride and bottoming out
• Air pressure adjustable from 5–100 PSI (per Air Lift's installation guide) to fine-tune support loaded or empty
• No drilling required (per Air Lift)

*Do not exceed the vehicle's gross vehicle weight rating (GVWR).

Application

• Ford F-250 Super Duty pickup: 2017–2019 (4WD, SRW and DRW)
• Ford F-350 Super Duty pickup: 2017–2019 (4WD, SRW and DRW)
• Ford F-450 Super Duty pickup: 2017–2026 (4WD)

Air Lift note: Will fit ALL models without a fifth-wheel hitch and will also fit most side mount fifth wheel hitch applications. Does not fit cab & chassis applications. Fits factory in-bed hitch system.

Always verify fitment with Air Lift's vehicle lookup at airliftcompany.com or by matching the Air Lift part number before ordering.

What’s Included

• Two air springs
• Mounting brackets and installation hardware
• Air line assembly with inflation valves and valve caps
• Air Lift installation guide MN-1054 (full itemized hardware list)

Cross-Reference / Part Numbers

• Air Lift part number: 57399
• Air Lift series: LoadLifter 5000
• Replacement air spring (Air Lift): 50293
• Air Lift installation guide: MN-1054 (covers kits 57399 / 88399 / 93399 / 77399)

Warranty

Air Lift Limited Warranty (effective 4/13/2026) for Air Lift air spring suspension kits: “Limited lifetime – the limited warranty continues as long as you own the original vehicle of installation.” Air Lift’s terms, conditions and exclusions apply; see airliftcompany.com/support/warranty.