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  1. Engine Modifications
    Hello everyone, I’m new here btw! I’ve got a 2009 JDM WRX Hatch EJ20X ProTune GFB Hybrid BOV otherwise, it’s fully stock. When the BOV is set to 100% recirculating, the exhaust backfires in the higher rpms. My questions are: is this safe? What exactly causes this? Any help will be...
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