"AmericanMuscle.com presents the Magnaflow 3"" Competition Cat-Back Exhaust System and 3"" Off-Road X-Pipe for the 2011 Mustang GT 5.0L 4V. This is a great soundclip to really show off how great this exhaust system sounds. If you are interested in learning more, or comparing exhausts, you can visit us here: http://www.americanmuscle.com/magnaflow-street-catback-2011gt.html"