I recieved mine today and curious if it is suppose to be 100% sealed or not. I can blow through it with my mouth with the valve closed. Seems like its going to be a boost leak. The camera makes it the gap look bigger than it actually is but you get the idea.

http://s970.photobucket.com/albums/a...nt=bypass1.jpg

http://s970.photobucket.com/albums/a...nt=bypass2.jpg

 

Those things never seal up completely, but depending on your current goal it works okay.

 

Correct, it is normal to have an air gap when the blade is in it's closed position. Provided the gap isn't too large, it won't hurt how much boost is produced. Bob