69 Dart exhaust tip and hanger questions

TTI hangers had the slots going all the way through like the factory hangers did. The factory hangers were not left or right specific. Simply turned them around to fit either side, so that the hanger "body" was under the frame rail which gave it added support. The TTI's I have are modeled after the factory style hanger, only much more robust. Not sure of the other options that are out there.