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Published on Feb 9, 2010
A video showing the difference between an old and new PCV valve off a 2008 STI.
Recently installed Grimmspeed's air/oil separator and figured I'd replace my PCV valve while I was in there. After 33K km of street and track driving at stage 2 levels, this is what my original PCV valve sounded like; it sounded quite gummed up. The replacement part number (includes the T-connector, best way to buy the valve) is #11819AA001 and it is labelled as "CONN CP-PCV".