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Grimmspeed Electronic Boost Control Solenoid 2008-2021 STI

SKU 057007
Original price $129.00 - Original price $129.00
Original price
$129.00 - $129.00
Current price $129.00

GrimmSpeed introduces the most complete and easy to use 3-Port Electronic Boost Solenoid available on the market. The GrimmSpeed aftermarket boost controller allows you to raise the OEM boost levels in a quick and efficient manner. If you try to raise the boost on the weak OEM boost solenoid it will start to become unpredictable and unable to maintain proper and safe boost levels. Using this solenoid you are able to spool your turbo quicker and maintain a rock solid boost level. They have made the solenoid to withstand 120psi, way more than any Subaru will see.

Revolutionizing the Subaru boost solenoid market, Grimmspeed has created model specific install brackets that allow you to directly fit the Grimmspeed Boost Solenoid into your Subaru for a factory fit. No more Zip-tying! You are given the factory fitment you have been waiting for. 

Staying with the OEM fitment theme, the Boost Solenoid uses a Subaru style wiring harness so you can simply unplug your OEM solenoid and plug in the Grimmspeed unit. No more cutting the oem wiring and crimping wires together!

Also new to the Subaru boost solenoid market, we have used ultra low-profile hose fittings to keep the unit as small and clean as possible. The hose fittings are nickel plated brass so you don't have to worry about them snapping off like the plastic hose fittings!

Full Features:
* Direct plug and play into oem wiring.
* MAC completely custom made valve
* Users can use AN fittings with the solenoid.
* Mounting bracket so it's a direct bolt on into factory location.
* Low-profile brass hose fittings(small in size so its compact).
* Specifically designed by GrimmSpeed to work safely with the factory Subaru ECU (requires tuning) and to reliably handle the vibrations and temperatures of your engine bay!
* The only direct "bolt in" design for all Subaru models. Direct bolt in mounting bracket and hardware included!
* Includes plug and play harness, no wire splicing required and easy to return to stock.
* Allows you to raise the factory boost levels with adding more response and more control.
* Allows you to get full boost sooner.
* Faster response and greater flow than any other valve out there. (by more than 10%!)
* Nickel plated brass fittings. (unlike the competitors failure prone plastic fittings)

Customer Reviews

Based on 3 reviews
John dunn
Boost controller

One of the essential parts to making power. Tons of online support for different mounting and routing options.


The Grimmspeed EBCS is one of the top-selling mods you can purchase for your STI! It is a direct bolt on mod that provides faster response and greater flow! With proper tuning, you couldn't ask for a better mod! Thank you for your 5 Stars!


Naiyel Jules
Excellent product by Grimmspeed

It is a great product, it was super easy to install it took about an hour to do it, but I am glad it is done and I got the Grimmspeed cover to go along with it!


The Grimmspeed Electronic Boost Control Solenoid is an iconic EBCS for the STI! It helps spool your turbo quicker and a solid boost level! It is also a plug and play mod that once everything is out of the way is easy to install! Definitely one of the best installs you can make! Thank you for your 5 Star Review!


Jorge Coblentz

Great boost controller and easy to install.

A 3-Port Boost Controller is one of the most important mods you can install in your STI! Grimmspeed is one of the leaders in the industry and with tune their boost control solenoid is a substantial improvement over stock! It is a simple plug and play installation that can provide some of the most potential to your vehicle! Thank you for your 5 Star Review!


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