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GrimmSpeed MAF Block Off Plate - 2008-2021 STI / 2008-2014 WRX

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. Now GrimmSpeed has the answer with the GrimmSpeed MAF Block-Off Plate which allows you to black off the factory MAF provision. This compact d. . . Show More >



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