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88399_v2_20180101
57399_v3-2020
88399_v4_20180101
88399_v5_20180101
5000ultimate88399

Part Number: 88399

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.
  • Internal jounce bumper prevents damage when driving with an empty air bag
  • Exclusive Air Lift air spring kit
  • Up to 5,000 lbs. of load-leveling capacity*

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AIR SPRING KIT

Part No. 88399

  • All necessary mounting brackets
  • All of the hardware needed for installation
  • Internal jounce bumper prevents damage when driving with an empty air bag
  • 2 air springs
  • Air lines
  • Schrader valve
  • Fully-illustrated installation guide

Kit Specs

Part No. 88399

Shipping Box Dimensions: 14.125 × 9.25 × 10.75 in
Shipping Weight: 35.4 lb
Installation Guide: Download Installation Guide
Application Type: Rear Kit
Replacement Air Spring: 84293
Warranty: Lifetime Limited
User Guide:Download User Guide

Kit Videos

Part No. 88399

  • Why Air? Why Air Lift?

  • LoadLifter 5000 Installation

  • On-Board Air Compressor Systems

Kit Compatible Vehicles

Part No. 88399

YearMakeModelDrive
2023FORDF-450 SUPER DUTY4 Wheel Drive
2022FORDF-450 SUPER DUTY4 Wheel Drive
2021FORDF-450 SUPER DUTY4 Wheel Drive
2020FORDF-450 SUPER DUTY4 Wheel Drive
2019FORDF-250 SUPER DUTY PICKUP4 Wheel Drive
2019FORDF-350 SUPER DUTY PICKUP4 Wheel Drive
2019FORDF-450 SUPER DUTY4 Wheel Drive
2018FORDF-250 SUPER DUTY PICKUP4 Wheel Drive
2018FORDF-350 SUPER DUTY PICKUP4 Wheel Drive
2018FORDF-450 SUPER DUTY4 Wheel Drive
2017FORDF-250 SUPER DUTY PICKUP4 Wheel Drive
2017FORDF-350 SUPER DUTY PICKUP4 Wheel Drive
2017FORDF-450 SUPER DUTY4 Wheel Drive

* Never exceed manufacturer’s recommended Gross Vehicle Weight Rating.

CALIFORNIA WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Greater than Grand

Next-Level Air Springs.

All the goodies of the LoadLifter 5000 air spring kit with an internal jounce bumper inside - giving you the ultimate in lift, ride comfort, and safety.

Internal Jounce Bumper

One More Layer of Awesome.

Our internal jounce bumper helps to absorb shock, even with zero air pressure. What more could you ask for?

  • Eliminates harsh jarring on rough roads
  • Maintenance-free! Safely run with zero air pressure
  • Replaces factory jounce bumper
  • Provides three-stage ride comfort

Up To 5,000 LBS.

Of Load Leveling Greatness.*

Our air springs beef up your existing suspension to boost your safety and comfort when hauling massive loads.