Road and Track has the best article I have seen so far, including videos with sound so you can hear the roar of the V8! Road & Track article
I wonder if production car will be this loud. form the article: Watch the 2016 Ford Mustang SVT / GT350 / GT500 undergoing testing on the Nürburgring Nordschleife! video posted July 27, 2014 6 pictures and video .