Celica Hobby - What is this hose?

Hi,

This weekend I removed the K&N intake I had on the car and replaced it with the stock airbox as I am trying to get some low end grunt back on the car. I followed the instructions in reverse and all seemed to be ok except for one tube.

The K&N 57i instructions (for removal) say to remove the hose going between the inlet manifold and the airbox and plug it with the provided nipple, so I removed the nipple, put the hose back on and threaded it through another hole in the airbox. It just does not look right though. I have looked around on the forum and although all the intake guides are very helpfull I cant seem to find anything relating to this specific hose. The only pic I could find on it was from the removal of the stock airbox guide. Mine seems to be missing a lower tube that connects onto the blue bit. (I did not do the initial removal and fitment on the K&N)

So far the car is running fine and I have not got any CEL lights on.

So my question is, whats the hose for and am I missing anything?

PS the pic is from Isaac's removal guide

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