I have a 2003 200 exc and am wondering if anybody has had any experience with the different FMF pipes for this bike. I am curious about the power differences between stock, gnarly and the fatty pipes. I have read that the stock pipe is hard to beat, however I am looking to get a little more overrev than stock. I am willing to give up a little on the bottomn for this. The profile of the gnarly appears to favor the bottom and mid which is already strong on the stock bike. I am thinking the fatty might be a better choice. Does anybody have any first hand experience. Thanks.