Being new to the site I have read some info on exhausts. I have a '13 XR and am looking for info about the stage 1 kits from Victory. I've read about the hole drilling but am interested in info about the offerings from Victory in regard to sound, if it opens the bike up at all (performance), changes good or bad for gas mileage. A lot of money to drop if not worth it. Anyone out there put on the stage 1 exhaust. Thanks in advance.