i have a 2004 and i bought a titnium4 with the powerbomb header and it went good so i bought a stage 1 camshaft and it got way to loud so i bought the fmf q silicer and now im running one set of jets above stock in the dynojet kit and its still way to rich and right now its -10 degress im shure if i went back to stockit would be good now but i think i will have the same problem this summer when it hits 80degres. and a few local atv shops told me that the q was desighned only for a stock motor with the 1st stage jets and the proflow kit they said it didnt flow hard enough for motor modifictaions like a cam so im looking for a pipe that will flow enough and and not be extremly loud like maybee as loud as my titnium before the cam i dont care if it a hole new system ne ideas where to go i was looking at the lrd pro 4