I installed my FMF rev pipe on my 220 and rode it in the Michigan woods on Saturday. WOW! I was impressed, the bike revved quicker and farther into the powerband. I was easily able to carry the front tire through woop sections and the bike just was a blast to ride. I love it now! The low end was just as good as before with no loss of torque. Thanks for all your advice on this forum, I've learned a great deal from everyone and it has shortened the learning curve and opened up opportunities to make improvments that I would have never known about. Thanks everyone.