I have a 2008 GT 4.6 liter with stock exhaust. To me, it sounds pretty good but if it could be a little louder and more throaty, I'd be happier. I've gone through much of the endless sound clips and they aren't much help. A couple of the systems can be eliminated but most of them sound like the old rice-grinders of the 80s and 90s. I don't know how to explain this but I don't like the sort of backward exhaust that you get when you let your foot off the gas...like internal backfiring sounds that the little cheapie *** cars make. I just bought this car and have a 66 GT that sounds great with Cherry Bombs on the 289. I have heard some new S-197s that sound good but I'm assuming that they have cams, headers, cat-backs or some combination that isn't acheived by simply adding axle-backs. Suggestions?