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GrimmSpeed Boost Control Solenoid (Part Number: )
GrimmSpeed Boost Control Solenoid (Part Number: )
GrimmSpeed Boost Control Solenoid (Part Number: )
GrimmSpeed Boost Control Solenoid (Part Number: )
GrimmSpeed Boost Control Solenoid (Part Number: )
GrimmSpeed Boost Control Solenoid (Part Number: )
GrimmSpeed Boost Control Solenoid
Subaru WRX 2002-2005
Read 8 Reviews | 4 Q&As
Part # 057001

In stock! Ships same day

Features & Product Details

The Grimmspeed 3-Port Electronic Boost Solenoid has been a treasure to the turbocharged world of sport compact drivers. one of their best selling items here at RallySport Direct is their easy to use 3-port Electronic Boost Control Solenoid. This particular boost control solenoid will allow the use to raise the OEM boost levels in a quick and efficient manner. Trying to raise the boost on the weak OEM solenoid can become unpredictable because of its inability to maintain proper and safe boost levels. By using the Grimmspeed unit you are able to improve boost response while maintaining a solid and consistent boost level. And it's also super durable as Griommspeed has crafted this solenoid to withstand 120psi which is much more than your engine will be able to see. 

One of the greater aspects of this boost control solenoid is that Grimmspeed designed these to have model specific brackets, as well as OEM connectors. This means that you can bolt the bracket right up to the factory solenoid provision and plug it right into the factory plug to be a direct fitment plug and play unit. this eliminates the need for wire splicing or using zip-ties that could potentially create a visual eyesore in the engine bay. 

Grimmspeed also made it a point to use ultra-low profile hose fittings to keep the unit as small and compact as possible. The hose fittings are made of nickel plated brass so you don't have to worry about breaking the factory 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 the 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)


Brand: GrimmSpeed
Adjustable: Yes
Color: Black
Number of Ports: 3
OEM Replacement: Yes
QTY: 1
Tuning Required: Yes
Mfgr. Warranty: Lifetime
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
RallySport Guarantee



8 Reviews
4.9 out of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Customer Photos and Videos
No user media. You can upload a photo or video of your install by posting a review.
Great Product 2 years ago
5out of 5stars

The boost controller was an easy 15 minute install and works really well! I would recommend this boost solenoid to anyone in the market for one!
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Benifits future upgrades 2 years ago
5out of 5stars

Quality product, works best with a tune. Since it controls boost differently, boost fluctuates drastically using the UTEC because its adjustments are limited. Faster spool is noticed. Initially the stock map overboosted but stock has seemed to figure it out and now provides solid boost pretty close to stock numbers without fluctuation. Fits the stock location perfectly. Makes a noticeable sound when it activates.
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Easy breezy  2 years ago
5out of 5stars

Installation is a breeze. Everything that you need to install the Boost Solenoid is included. With my TD04 I noticed the turbo spools much quicker in first and second gear. On a side note, a tune is required if youre going to install this modification. Much better than the stock solenoid, would be again!!
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Great EBC 3 years ago
4out of 5stars

I have ran my EBC since 2011 and I can tell you these parts are durable and very very reliable. I purchased a new one last year (2015) just because I thought it would be time retire my old EBC.
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Works great.  4 years ago
5out of 5stars

This BCS works great. Boost comes on hard and much smoother than the factory solenoid. Night and day difference.
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  • Q: jdm ej207  Banana.Wrx11 months ago

    i have a jdm ej207 version 8 and have been looking for parts people say wry parts will work most of the time just wondering if this is one of those cases I'm also running the jam ecu with avcs
  • Q: 2002wrx ebcs   bugeyemafia904 years ago

    I already have had my car tuned with the oem bcs it just won't hold full boost so will I have to get it retuned with this ebcs?
  • Q: 2002 wrx Boost Solenoid with Manual Boost Controller  axelbowen667485 years ago

    Will this work in conjunction with the GS Manual Boost Controller? Will my tuner have any problems tuning with that setup? -2002 wrx, catless, sti TMIC, stock td04
    • 0 of 0 people found the following answer helpful

      A:  This can be used along with a manual boost controller if wanted and we suggest talking to your tuner about how they feel about tuning a hybrid boost control setup.

      Zach G. @ RallySport Direct 5 years ago  
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    • 1 of 1 people found the following answer helpful

      A:  Yes you can run the two in conjunction, this is known as a hybrid set up. It gives you the best of both worlds of boost control. These are fairly easy to set up but you will want to contact your tuner in regards to their abilities. Mike

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  • Q: Wrx 2004 problem  Soobie6 years ago

    will this BCS need a pro-tune to remplace my defective oem bcs ?
    • 0 of 0 people found the following answer helpful

      A:  A custom tune is required with this boost solenoid.

      Zach G. @ RallySport Direct 5 years ago  
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    • 0 of 0 people found the following answer helpful

      A:  Yes tuning is required to run this solenoid. Mike

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