2017-2020 Ford F450 – "Load Lifter 5,000" Rear Air Spring Kit by Air Lift

Air Lift 57399
Air Lift - 57399-f450
Authorized Dealer
Sale Price:
  • $311.36
$432.44 Save: $121.08 (28%)

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Average Delivery Time: 2 to 3 weeks


This Air Lift "Load Lifter 5000" Air Bag Helper Spring Kit is designed to provide a comfortable ride while increasing the level load capacity of your Ford F450 up to 5,000 lbs.

Made with rugged, durable components, these totally adjustable air springs mount between the frame and the suspension of your Ford F450 to provide load control through the use of air pressure. All Air Lift air bag helper springs are custom fit for a simple bolt-on installation. An optional air control kit can be added for additional convenience.

All Air Lift air bag helper springs are backed by the Air Lift exclusive "60 Day Ride Satisfaction Guarantee" and a "Limited Lifetime Warranty". image

Features and Benefits

  • "NO DRILLING" image
  • Designed for Rear axle
  • Eliminates suspension sag, sway, and bottoming out
  • Increases level load capacity to 5,000 lbs
  • Made with rugged, durable components
  • Quick & easy installation with common hand tools
  • Adjustable for a great ride - loaded or unloaded
  • Limited Lifetime Warranty
  • 60 Day Ride Satisfaction Guarantee

Installation Notes

  • Do NOT exceed the vehicle’s Recommended Gross Vehicle Weight Rating (GVWR)
  • Designed for the Rear axle
  • Will fit most side-mount fifth wheel hitch
  • Does not fit cab & chassis models
  • Under Frame Kit
  • Fits single rear wheel (SRW) and dual rear wheel (DRW) models
  • Does not fit with Una-Goose hitch

Tech Specs

Download Instructions: 57399 Instructions
Level Load Capacity: 5,000 lbs
Average Install Time: 2 hours
Weight: 42.00 lbs.
Part 57399 fits:
  • 2020 Ford F450
  • 2019 Ford F450
  • 2018 Ford F450
  • 2017 Ford F450



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