Grimmspeed 06-07 WRX/ 04-07 STI Boost Control Solenoid

Regular price $119.00 USD $129.00 USD Cyber Week deal

Ready To Ship! Special Order! Ships in 10+ weeks

Part # grm057002

GrimmSpeedª introduces the most complete and easy to use Subaru WRX, STi, FXT, and LegacyGT 3-Port Electronic Boost Solenoid available on the market. Our 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 our solenoid you are able to spool your turbo quicker and maintain a rock solid boost level. We have made our solenoid to withstand 120psi, way more than any Subaru will see.

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

Staying with the OEM fitment theme, our Boost Solenoid uses a Subaru style wiring harness so you can simply unplug your OEM solenoid and plug ours in. 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!


Get into Boost Much Quicker (Flows 10% more than the competition)
Plug and Play into OEM Harness (no splicing wire like other BCS!)
Factory Fit with clean install
Works Safely with Factory Subaru ECU (custom coil to match ECU)
Nickel Plated Fittings as this is Built To Last (not the easily breakable plastic fittings!)
Easy to Install and Very Easy to Tune
The Only Direct Bolt-IN BCS for all Subaru Models
Users can use AN fittings with the solenoid.
MAC Valve's has completely custom made the valve for us(only MAC valve on the market to be custom made for automotive tuning use).
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! (specify which model before ordering)
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

Customer Reviews

Based on 2 reviews
Dwayne W. (Grand Island, NE, US)
Great Product

Absolutely enjoying the boost controller, easy and straightforward to install.

Michael B.

I've been around a lot of boosted cars, and the most highly recommended and trusted electronic boost control solenoid is the grimmspeed EBCS. It is very trustworthy, and I wouldn't even second guess its ability to properly control boost. This is an excellent product, and I highly recommend it. NOTE! You must adjust your tune when using this product to accommodate the difference in wastegate duty.

Customer Questions


In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail.
All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

All international orders outside of the USA are subject to duties and taxes per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.