cool - what exhaust system did you go with and how much was it. The other question i have is did you do the airbox and the exhaust at the same time? What Jet kit did you buy? Thanks a lot! I just did the Baffle mod on the stock exhaust until i can get an MRD exhaust for it. I used Skoots recomendation of the NCVS needle(2004 CRF450R option needle)clip on 3rd position and a 165 main jet. Cost me no more that 30 bucks. I did do the Airbox and exhaust mod at the same time Check the sticky's on the top of the 450x forums. Everthing you need to know is in there. Pics and all. I can't wait to ride in the desert.