ok, so I bought the OBX alxe back exhaust off ebay, and im trying to put it on. I cant get the bolts off the flange that is right in front of the rear axle on the orginal exhaust system . It appears that the nuts on the one side are welded on... but the bolt itself shouldnt be welded as well, right? Any thoughts or suggestions appreciated. (Hopefully before i just give up and send it back.