I have a set of carli add-a-packs and u-bolts for a 2011-up F250/F350. Nothing wrong with them, just more lift in the rear than I expected. You will need to purchase new center pins. These are $750 new. Asking $650 obo. Might do some trading. Email is [email protected] or PM me on here. Located close to Memphis, TN. Website link below is Carli's description of them.
Ford Super Duty Progressive 6 Leaf Mini Pack
Ford Super Duty Progressive 6 Leaf Mini Pack