Put a HKS full atmo on my car and she hardly idled.

If you must then buy something like the Turbosmart Kompact Plumb back BOV ~ $120 - $160

Don't buy a cheap eBay spec unit from chinawannna make sure it's legit.


And make sure it's adjustable and plumbs back some how, like the Kompact I mentioned above.


Or remove the thing all together like me. Massive F&F Style flutter. You instantly gain about 20kw! "joking"
And will kill the tiny little TD04. Maybe, one day, I dont know, yeah, nah.

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1989 Legacy GT --> 2001 GD WRX --> 1999 GF8 WRX --> 2001 GD WRX

hi my car came with a v port atmospheric bov runs fine my06 wrx

They give no performance gain whatsoever.

Without tuning the ecu to suit, car will idle like shit & run rich.

Will suit your rims down to a tee however.

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500+hp and helis on tap, eta - June 2025.

i thaught external bov's where illegal on streetcars these days... something to do with emissions?

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06 sti

Yeh im pretty confident its illegal to vent to atmosphere