Carli Suspension Add-A-Pack Rear Springs 4.5/5.5" Lift 17-26 Ford SuperDuty F-250/F-350 4x4

Carli's progressive add a pack rear springs are a proprietary design built specifically for Carli by Deaver Spring MFG. The lower overload leaf is removed and is replaced with 6 thinner gauge leafs. The O.E.M. load capacity is still maintained while improved ride is achieved. The add-a-packs will help to take the harshness out of everyday freeway driving.