I'va also found that some people buy an aftermarket BOV, then hook it up
with a "recirculation" kit. This usually only involves one hose and some clamps,
effectively making the BOV operate like a BV while still retaining some of
"whoooosh" we all love. Using a metal pipe rather than a hose makes this
effect louder as the rubber absorbs some of the sound.
Anyways, I'll post some sound bytes of my Greddy Type S hooked up
with/without recirculation kit when I get it. Might be awhile...
Cheers!,
-=Littlestan=-