I'm a person who's having a problem with Greddy Type-S BOV...
I was gonna do what w_tomas told me ( running a vac hose from the lower nipple on the BOV to the nipple that is srewed on upper intercooler pipe.).
And I saw these pictures:

1. http://www.roadraceengineering.com/e...ter-modded.jpg

2. http://www.roadraceengineering.com/e...ssembled-3.jpg

3. http://www.roadraceengineering.com/e...-installed.jpg

hmmm
I don't know why they connected the adapter and the lower nipple on the BOV.

Then, I dont know if that will be the same thing that running a hose from upper intercooler pipe to the lower nipple.

Ahhhh...so confusing!
someone plz what's going on.