It's the piece that goes from the intake manifold to the resonator box, and has two hoses coming off of it. Subaru wants $100, and so does subarugenuineparts.com but that's ridiculous! Basically the same piece on my e30 was $10.
Mine's old and a piece cracked off so I need one, but I don't want to pay that...
Hmmm, maybe the e30 piece will fit, would there be any harm in changing the length of one of the hoses on it?
here's the e30 piece, I think I could make it work
![Image](http://i217.photobucket.com/albums/cc152/lifeiskaos/DSCN1711.jpg)