Call me selfish, but no v6 stang should get a dual exhaust stock. No idea how it sounds, but the article says owners wont miss the v8 roar there use to.
http://www.autoblog.com/2009/11/30/2011-ford-mustang-v6-la-2009-preview/
http://www.autoblog.com/2009/11/30/2011-ford-mustang-v6-la-2009-preview/