Interesting, your Maxflow RACE BOV is described here as acting as a Bypass valve @ 4-5 psi and as BOV @ 10-11 psi.
Confused anybody?
Maybe, just maybe, ...it depends on the application it's being used for.
E.g. In a turbo car it's a BOV, ...in a supercharged car it's a BPV.
99.9% sure that's correct.
More info here; http://my350z.com/fo...-questions.html
This is mine which yours probably/should look like too Ian...