(was) Very disappointed in Mancini Racing

Had the same problem with the shackle/bolts as you had. After calling Mancini about the problem, I learned the nuts which are locking nuts are only supposed to be torqued to like 7-10 ft lbs Unlike the stock nuts which I think run about 20-25. Mancini was quick to replace the shackles and shipped them free to me and I didn't even have to return the old ones. The problem lies in not having any instructions with them telling you what to torque the new nuts to. Since installation, I have not had any problems.