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  1. P

    Impreza STI ver.5 BOV Advise

    I don't know, I want to understand why previews owner took off bov, I don't think he made it just like that, because the car has lots of expensive modifications... :(
  2. P

    Impreza STI ver.5 BOV Advise

    Thank you The "trrr" sound comes from air filter when the throttle is closed, so this means that the air instead of going out by bov the pressure goes through intake and air filter and causes this sound. where this pressure goes by default? When I got this car bov was disabled, or may be is...
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    Impreza STI ver.5 BOV Advise

    I bought my STI version 5 from Japan with some modifications: HKS Fcon V pro Computer, HKS EVC V Boost Controller, APEXI exhaust, HKS intake, NO Airflow meter... and there was no blow off valve This is a picture of engine, there was no blow off valve, I was confused and decided to install...

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