I have an 06 and I found two pipes on the market that will fit. big gun and pro circuit. I have the t-4 by pro and I had to modify the head pipe to make it work. it is the loudest pipe out there so if u want quiter go with the big gun. my friend has that and it isnt nearly as loud. and the air box thing. I was on vacation in north carolina and the dealer told me to remove it. and when he did that it was alot quicker with acceleration. if u look up the specs on the size of the jet you can drill the stock jet out or order it individually. I ordered one and drilled one with the same overall effect. just payattention to how you take apart the carb, it is diffucult but pay attention to how the float and all the internals where possitioned before you turn the carb up side down.