dual bov temp question

[mustracetsi]

This is only temperary until my ic piping comes and couplers just picked up bov and adapter pipe but still have stock in place. Question is if I put this bov in and run the vac line to the new one and leave the stock bov in place with the vac line remove will it still open or stay shut like im hoping

 

[sidewaystsi]

It will open.Boost pressure is what keeps it shut.Tee the bov's together for the time being.