Who her runs the hks BOV and what insert do you have im trying to find out which one makes the chirp follow by a whoosh of air, and which one sound like just a whoosh of are simular to the blitz BOV.

 

purple insert makes the sound you want...........

 

The crazy loud chirp should be the insert that comes already in it (silver). Haven't heard the others.

 

I'm running the purple fin and it gets rid of that annoying high pitch whistle. Now it sounds more like a swoosh of air. Sounds awesome especially when it flutters. The gold one looks identical to the silver (stock) one IMO. Didnt want to pay 20 bucks for the same thing.

 

I thought that hks BOV didnt flutter? I here if there is a flutter then it is not good. I used to have the greddy type S on my last ride and when it flutter i knew there was something wrong.

 

Thanks for everyone help.