While we're on the subject of "wtf is this", I was creeping around under the SVX checking things out.
1) What size wrench do you need to get the o2 sensors out
2) What the heck is this stray tube hanging down from nowhere? It seems to be coming from the floor board on the passenger's side.
http://www.subaru-svx.net/photos/fil...u_S./33167.jpg
It's just a standard rubber hose.