X pipes w/ side exhaust!!!

Yes, it's possible. I don't know that I would recommend it though. I didn't have headers, but I had an off road X with the side exhaust, and the drone and trumpeting was absolutely horrible. And I'm not one to complain about drone. But when it trumpeted, I was embarrassed because it didn't even sound like a Mustang. If you're set on an X pipe, get a catted one. Otherwise, go H or Pro-Chamber.

But here's what it sounded like. You can hear the trumpeting pretty easily around 1:30 into the video.