So I am new to the forum as well as very recently becoming the owner of a 2017 300s with the 5.7 Hemi. I had heard from friends that a muffler and resonator delete is awesome for sound and from what I have heard myself in person that is what I was planning on doing. The other thing I had heard was that when the MDS system kicks on and shuts down cylinders, the exhaust note is really bad not only in terms of the sound itself but also the drone from less cylinders firing. I definitely want that loud Hemi note but I really don't want it to sound like garbage when I'm not on it. If anyone has any experience they'd like to share on the subject I'd greatly appreciate it!