Bump to this thread.
I am hearing for the first time about the vibration in the exhaust with the Rock Hard... this is exactly my current complaint. At very low RPM's there is a vibration that is easily heard and drives me nuts!!!
I had it installed by a shop, do you think I need to look at that? Is it an easy fix? anyone had this same problem?
I have a '08 2dr JK, stock exhaust and the heavy-duty cross-member from Clayton, the gas skid and the trans skid. Planning on a evap relocation and the oil pan skid.
Thanks for your help!