Originally posted by AlboWRX
The BOV does reduce turbo lag..
Worst misinformation EVER
The WRX comes from the factory with a recirculating BOV. And unless your factory BOV is leaking boost, adding a different BOV does NOTHING for spoolup, and anyone that even remotely understands the intake tract of a turbo car will know this. There are only 2 benefits that come with an aftermarket BOV.
1. The noise
2. The ability to run over 18PSI of boost.
If you are not making more than 18PSI of boost, there is ABSOLUTELY no benefit in replacing the factory BOV< other than its ugly and quiet, which is why I replaced mine.