Where does the hose that comes connected in the airbox from the side go ? I took out the airbox when installing ProfecB and it seems to me that this hose only gets hot air from behind the radiator - it goes underneath the airbox, but its not connected anywhere.

So whats the deal with that hose ?

 

It goes nowhere. That hose has driven many an owner nuts. It's an extension of the airpump intake if I remember right.

 

that hose leads to nowhere and it vents out air. It does not suck in the hot air from the radiator. I asked the same question a couple of months ago.

 

That hose vents air from the stock blow-off valve. It was designed that way to quiet the hissing sound the blow-off makes.