Exhaust note

So I went off-roading for the first time this weekend. The X held up like a champ. Minor damage, but nothing I'm worried about. The thing is, my exhaust note has totally changed. It's now a low rumble, kinda sounds like I have aftermarket exhaust on it. I'm wondering if I maybe have a hole in my exhaust somewhere, or if the exhaust just broke in, as I only have about 2200 miles on it. What do your exhausts sound like?

i dunno, but my exhaust has sounded the same since day 1. i've just tipped over 7000 miles.