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heh, that's pretty original. not my style, but i'm sure someone out there will like this thing.
 

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According to the web site:

"By demanding a small amount of back-pressure at low rpm’s and minimal back-pressure at high rpm's, you get an overall increase in performance through the full power range."

This is a great idea, but it is already exactly what our bikes do (by using a butterfly valve instead of a turbine). So, unless you really dig the spinny-gun effect, I'd probably skip it.
 
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