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Coupon Code Boost5 at checkout

Due to an increase in sales volume and demand, please allow some extra time for items to ship and please inquire about inventory if it is not directly listed on the product.

Financing available for as low as 0%.

We're open and shipping!

Coupon Code Boost5 at checkout

Due to an increase in sales volume and demand, please allow some extra time for items to ship and please inquire about inventory if it is not directly listed on the product.

Financing available for as low as 0%.

GrimmSpeed 3-Port EBCS Boost Controller - 08-20 STI



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 your motor.  With the GrimmSpeed solenoid, you. . . Show More >


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