You should reconsider.
1st, you'll have exhaust venting right near your seat. And at trail speeds, you'll be smelling exhaust all day long. Big headache. Big nausia.
2nd, that pipe will be smokin' hot. You'll burn your shins for sure.
3rd, without the protection of the frame or body, you'll risk being a fire starter in tall grass, or as you trail thru tight brush.
4th, it increase chances that some bystander will get burned as they try and sneak pass you when you're all stuck behind some obsticle, and they want to get ahead to look-see.
5th, every time you want to crawl underneath to take a peak at something, you'll not have anything to grab as you climb under and as you climb back out, because you're body edge is a exhaust pipe.
and on, and on, and on.
Do yourself a favor, build a body protection separate from the exhaust, and go to a quality exhaust guy and have him route the (dedicated) exhaust away from all crap that'll bash it.
but if you don't, at least dig this thread out of the trash in a few months and tell us how it's working out for ya. 'Cause I'll be the first to say "It could work" (but it sure don't look promising) (And put a plug in that front end)
T.
