i turned up the boost just a lil ... and the bov blows open when it sees about 10 psi or more .
we tested this by using a 2004 STI factory BPV ( vented to atmos ) and it held all the boost we could put to it .

so if your considering the ebay bov dont count on putting more than 8-10 PSI behind it ...

Im currently waiting on a 2003 wrx factory BPV to put on my car and i hope to figure out how to run it recirculated.
