I have a 2011 Mustang GT and I recently purchased and installed a Borla S Type Axle Back exhaust and it sounds great but is a bit too lous. Does anyone know of any quick ways to make the car a bit quieter. I heard of the steel wool inside the tips of the muffler but someone please tell me another way. The car is completely stock just the Borla S type axle backs are on it. Thanks alot!!!