dude the reason i ask, is cause not every set up is the same. I youtube this and all I got was a whole bunch of MS3's so that doesn't apply to me. And look this forum has been open for 8 years and unless its off topic or about a 2010, its all been said before at some other point. Do y'all do this to anyone who's asked a repeat question? My bad... but this is fairly discouraging. I like the vibrant, I've heard it, but once again only on a MS3, I've heard a COBB but also on an MS3. So when i dont see what I'm lookin for on the net I come back and ask you guys.
It's not so much that people get on your case when you ask a question that's been asked before, but you give the appearance of not putting any effort into your questions at all.
Youtube has tons of MS3 videos but it also has tons of NA Mazda3 videos as well. Maybe you need to improve your search techniques.
Search Mazda3 Borla, Mazda3 Vibrant, Mazda3 Magnaflow and you will get TONS of hits on YouTube. It's really not that hard.
If you want something more subtle, try searching for RacingBeat or Mazdaspeed.
You can even get the Mazdaspeed3 exhaust set up put on your Mazda3 and see a performance gain.