Has anybody put Magnaflows, or I guess any other muffler on their Stang's stock exhaust just by removing the stock mufflers? Will it sound good? Just trying to save a few bucks but add some sound. I'm thinking the 4-inch round style mufflers by Magnaflow (I'm open to suggestions!!). Also does anybody know what the stock pipe size is or what size inlet/outlet I would have to get if I tried this out?