i have a greddy type S not recirculated, and my car only stalled the first few days untill the ecu got use to it. Now i stalled once in the past 2 weeks. I will be recirculating soon though.
yeah, i cant wait to get the ion performance fmic, i should have it in two weeks.. i'll have the cash by then.. it'll be worth it.. having hardpipes over this plastic s***.
from the search i ran and the 30 sec of reading i did, it sounds like it does just that. sends some air back to the intake and vents the rest. interesting idea. though if you get an open air filter, the bpv is loud as is.