Man all I have to say is thanks to my fiancé she bought the pipe for me, for my birthday and I love it. I have not really had a chance to check top speed yet to see if it increased any but it sure does sound good. The dealer put it on and said they used a 155 main jet is that about what everyone else is using. It seems to run good but I have not pulled the spark plug yet to check it. I am also running all 10 discs. One thing I have notice is it seems to respond a lot better than before. When I hit the gas there is no hesitation. I could just be my imagination though I am not for sure. Let me know what you guys' noticed when you put yours on. I know a guy that has the White brother’s pipe on his Wolverine so I am interested to see if there is a difference in the 2 pipes like in top speed or anything. I also ordered the Pro Design filter attachment today so I should have it by the weekend. Just let me know what you guys' noticed when you put your pipe on.