Is there a reason you're considering this? How long do you plan to own the bike? For the cost of an exhaust you could go to the track for a day with a quality organization. I'd save the modifications for a bike you'll have long-term, presuming that's not your plan with this one.
Common exhaust manus:
Dragging knee is for the track, and dragging tail is for the lot. --Kane Friesen
When you're in a car, you're watching a movie; when you're on a bike, you're in the movie. --Robert Pirsig
Identity theft is not Fun