I had an exhaust pipe separate from the flange under my 07 Nissan DD. While poking around under the car I noticed there was a braided ground strap between the muffler and the frame -broken of course. I've done a couple of google searches about it and the answers are all over the place (Duh...it's the internet). Anybody have any real info on why my exhaust would be grounded, and how important is it to get a ground reestablished? Thanks!