Got the Flowmaster installed this morning. Sounds great. IMO this is how it should have come from the factory. Plenty of rumble but not obnoxiously loud. I did NOT install the x pipe, it was held up in shipping and should arrive today. My thinking was I would put the x pipe on if i wanted it to be a little louder. I will drive the car a few hundred miles and make up my mind then. But chances are i'll have the X pipe installed for a little more sound.
Side note: While in stealth mode the valves rattle. I don't ever plan on running in stealth mode but regardless i will take it up with Flowmaster. Short vid below on a cold startup.
https://i.imgur.com/bPu8wJX.mp4