It seems like the stock BPV is unheard. My "mods" are listed below and when getting on the throttle (shift about 5k) I can clearly hear a "Psssshhhh" coming from the stock BPV. It even flutters at partial throttle! Not loud, but noticable.

Is this normal? Do I ultrasensitive hearing? I am pretty sure there is no leaking because the boost will read a little about 1.25 BAR and taper off a little over 1 BAR. Any ideas?

Also where can I get a MR BPV?

 

of course its gonna be noticeable but nothing like an aftermarktet bov or mr bpv, ur just gonna hear it slightly no matter what because ur turbo builds up air and it needs to be released somehow

 

I definetly noticed mine making noise noise after I put in my aftermarket filter.
It's perfectly normal. The air from the BPV goes back through the intake and the high flow filter will make the noise much more noticeable (if your paying close attention).