Hey Guys, I have been struggling with the noise/more power issue for quite some time and I now have a line on a barely used FMF Q2 for my 2004 WR450. My question is regarding noise. Of course the FMF pipe will be louder than my stock corked up exhaust, but will it be significantly louder? I did try the stock exhaust uncorked but found it to be obnoxiously loud. Would the FMF be anywhere near as loud as an uncorked stock exhaust? Where would a YZ exhaust system be relative to noise? Cheers.