I have the same setup (no longtubes). I did have some pretty bad drone around 2k rpms but as I've put more miles on it, the drone has quieted down quite a bit.
Haha. This reminds me of that other ruby red '15 with the roush axle-backs and long tube headers on youtube. Crazy loud man. Thought about going this route, but after listening to my exhaust since the blower installation, I've changed my mind. Don't think I'd be able to enjoy hauling ass out here without being too paranoid. I love the sound of it though.