I have a 2003 wr450 that has the free mods done, except the snorkle removal (bought it this way), JD jet kit, and Zip-ty fuel screw. It had the stock pipe with the pro moto insert until today. I installed the mid pipe and silencer from Dubach racing. It definitely is louder and feels like it has a lot more power from riding it up and down the street. My question is, Do I need to change the jetting because of the pipe? Also, now that I have exhaust, should I remove the snorkel? How much of a difference would there be and where would it be felt? More snap? More bottom end? top end? etc? Thanks for the help.