Went to auto zone and ordered a new tail pipe ( $35. ) problem is the old tailpipe flange is rusted or should i say bonded by rust onto the muffler rear flange, the two bolts are hardly recognized as bolts from the rust--question should i try and use a grinder and try and cut the old flange piece away from the muffler flange or take it to a muffler shop and pay them to use their torch to heat it off, don't want to break the flange on a $135. Rear muffler if i do it myself with the grinder and i imagine the muffler shop will charge an arm and a leg to take it off. Just looking for your idea's, thank you. IT LOOKS LIKE IT MAY BE THE ORIGINAL PIPE AND MUFFLER