I just recently got a 2013 GT. However, the person who owned it before me did a muffler delete and also put on boss 302 side pipes. Needless to say it is very very loud, and my ears are suffering lol. It also drones something awful. I’m wondering how quiet the stock muffler is comparatively, and just how quiet it is in general and whether it drones. I’d like to start my mustang from stock and add what I want when I want. Thanks!