All the above answers are great. Get a pipe after your suspension has been perfectly dialed in,reeds,porting,polishing,proper tires for your terain, and that your skill level has neccesated a little bit more power. I think most riders forget the easiest way for 2-5 % more power. Race gas like VP.Now on that note I used to be in the camp of louder is faster,but louder is usually just louder,and it is the single biggest blackeye for our sport. I run FMF Q pipes on both my bikes now and swear by them,I am a woods rider and the added torque over stock is VERY NOTICIABLE. We need more manufacturers to step up to the plate like FMF and make a quiet pipe which does improve power. :thumb: