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GrimmSpeed 3-Port EBCS Boost Controller - 08-21 STI

This product is out of stock and available for purchase on backorder. Please contact us for an ETA or alternatives.


The GrimmSpeed aftermarket boost controller allows you to raise the OEM boost levels in a quick and efficient manner.  The OEM solenoid is programmed to make only so much boost, so surpassing the levels on the OEM solenoid can become dangerous as the target numbers become unpredictable, and dangerous for . . . Show More >

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