The Carli progressive Add‑A‑Pack passenger‑side unit for 2017–2023 Ford F-250 and F-350 4x4 models provides a 4.5" rear lift on the passenger side. Installed into the rear leaf spring assembly, it is intended to be used as part of a matched set to achieve the specified lift while integrating with progressive spring geometry for proper spring engagement.
Carli 17-23 Ford F250/350 4x4 Progressive Add-A-Pack Passenger - 4.5in Lift