sorry to ressurect an old thread, i have a w10 motor and i am looking for a good src to put my wg line on. i have the stock w10 bpv and it has too nipples on the actual peice, one on top and one on bottom, what is the bottom nipple for i have it capped off at the moment, does that only see boost? and could that be used as a wg line since it is before the throttle body, if not i will look for the plug thats by the throttle body and use that.