No when they installed the downpipe. Check the harness the o2 plugs to. Not the o2 harness. Maybe the installer yanked the harness and stretched it when removing/installing the downpipe.
I’m sure it adds some structural rigidity. But doubt by much. It’s like any other brace. Can remove it and doubt you’ll feel any difference if you’re not pushing the car a bit. I have the hks bar. I feel no difference with rigidity or rattles. Only thing was it looks better aesthetically and i...