my car start to have boost leak at 24psi and above.
First I thought is because of the bov or the connection of the hose or pipping.
but I check all the hose and the pipe everything is perfect fits.

change bov couple time and right now it is aps one. still have this issue.

I saw some post before about the hallman mbc bov that you need some mod to hold the big boost. I am trying to search again but cannot find it.

is this possible cause by my mbc?

(when the car boost at 25psi, I can hear ssshhh... and my needle boost gauge moving very fast from 23-25psi, and Then after couple seconds it hold at 25 psi perfectly) So basically it don't drop the boost. it just not perfect boosting


thank you and sorry for my english.