here's where I am today: was originally looking for that G coupe / 350z sound for my sedan and went out and purchased an ARK catback. Loved the way the ARK sounded paired up with stock cats but then realized that I had an issue with one of my oem cats so replaced them with a used pair of FI HFCs. The power felt great but was almost obnoxiously loud. Less than a year later I then experienced a crack weld with one of the FI HFCs so replaced those with a pair of used Kinetix HFCs. Sound stayed about the same, maybe slightly throatier...still too loud. Recently decided I def need to tone it down a bit but didn't want to mess with taking the cats off again so decided to get rid of my ARK catback. I picked up a pair of used Tanabe axle back mufflers that look brand new and thought that would be a good step towards trying to quite things down a bit. So this past weekend I bolted up my stock y-pipe & midpipe to the Kinetix HFCs and the Tanabe mufflers. I can't believe how quiet it is! Figured having the high flow cats and after market mufflers it would be much louder than what it is. That's my story for now but I'm highly thinking of upgrading the y-pipe...do you guys have any recommendations? Doesn't look like there's a whole lot out there that will fit AWD sedans.