well i guess you should ask how to go about removing the stock boost gauge and if it will do any harm. i never torn my off so I cant tell you what it looks like
found this on a Subaru forum
http://www.iwsti.com/forums/how-inst...ost-gauge.html
says you can take the stock one out and just use that vacuum line. i would concur w/o actually seeing it, it just makes sense.
here's one with picture
http://www.srtforums.com/forums/f75/...ge-vei-377470/
wtb Google search button and some balls to go start taking things off.