When installing the exhaust hangers, it would be important to know if a load on the bolt at the time of people re-tightening the nut (or the bolt for that matter) would have any impact.
If your car is jacked up from the body and the rear is hanging, torque fators on the bolts may be compromised due to the weight.
"But resist we much; we must; and we will much; about that be committed."
~Rev. Al Sharpton
2010 E92 M3|Silverstone II|M-DCT|NCSW|2MT|ZCW|ZPP|ZTP|302|507|Gas Guzzler Tax