[Guest]

Does anyone know at what level an HKS BOV will leak air? and do you just tighten the nut on the front to stop any leaks??
Is there a fine line between leaking boost and releasing it on lift off??
If not can't I just tighten the nut right up??

 

[Guest]

They don't leak !
The HKS valve operates by the vacuum line connected 2 the inlet manifold , actually the more boost pressure the harder it closes.
The adjustment bolt is for opening threshold related 2 inlet vacuum.