Simple question, do not want in any ways to disrupt from Dave exhaust selection, but am I the only one who feels top down to sound is lessened? For me, top up is a little louder. matter of perception probably!
Dave, as Marc have said, the drone zone is totally 2000rpm. all the above you've posted sounds good, but more often than not hearing in person is the best. He is also right on another point, 90% of the time, Borla is the most ''minimal to no drone'' exhaust choice one can make. On my end, the setup on my car is quite different, axle backs only are done with MBRP and I am happy with it. If I recall, anything Roush is quite loud (anyone can guess what I had on the almost deafening focus? lol). If you have a chance to hear a Roush on your generation of mustang, would be the best for you to pinpoint, but Borla is a solid choice.