Also, there is one review of the Granatelli exhaust on the Stage3motorsports page here: 2011-2013 Mustang 5.0L Granatelli Axle-Back Exhaust Kit
Customer Reviews This exhaust sounds great!!!!!
Really don't everyone to know about these mufflers, can't have everyones car sound like mine. This exhaust has the deepest non-raspy tone of any I have heard. It doesn't pop or cackle, just a deep rumble, sounds like a big block engine. I found them by accident on a youtube sound clip and was sold. Stage3 has a great price on them and shipped them quickly. Kudos to Granatelli, these are put together flawlessly.
Unless that's an employee hyping them up, sounds like a good review to me.