It does whistle with just the stem...If the stem DOES whistle, then it's a bad drilling and you should send it back if possible.
If it doesn't do it when you smoke normally whats the problem?it only does it when i put an intense drag on it...
when I am smoking normally it doesnt make a sound...
http://pipesmagazine.com/forums/topic/my-new-pipe-6What shape and is it a system pipe or not?