GrimmSpeed MAF Block Off Plate
When you upgrade your Subaru to a Blow Through System you will need a way to block off the location where the old MAF Sensor was located.
The Grimmspeed MAF block off plate is a simply, clean metal plate that is necessary when converting your WRX EJ motor over to a speed density setup or blow through MAF setup. This block off plate screws in easily and can be removed just as fast with no detection of it ever being installed!
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