water bypass

hi, i've heard that since you SHOULD not get water into a cold air intake, i've heard that there is a water by pass system taht you can get for it. is this ture and how does it work?
 
There's a description at the bottom of the link:

http://www.aempower.com/product_intake.asp

I have an Injen CAI and have NOT found it necessary to have a bypass valve. BTW, I live in Oregon where it rains a lot! As long as you don't try crossing a lake, you should be fine.

miatadrftr27 said:
hi, i've heard that since you SHOULD not get water into a cold air intake, i've heard that there is a water by pass system taht you can get for it. is this ture and how does it work?
 
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