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COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
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User Media for: COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008
User Media for: COBB Tuning 3-Port Boost Control Solenoid - Subaru WRX/STi 2002-2007 / Forester XT 2004-2008

COBB Tuning 3-Port Boost Control Solenoid

Subaru WRX/STi 2002-2007 / Forester XT 2004-2008

Read 27 Reviews | 39 Q&As
Part # 712750
$115.00

In stock!

Features & Product Details

The COBB 3-Port Boost Solenoid (BCS) is an excellent upgrade for modern turbocharged vehicles, enabling precise boost control in a tidy package that is easy to install and tune. This BCS will eliminate boost fluctuations and boost creep inherent in the OEM boost control system, providing stable and repeatable boost control to base the vehicle's tune on. It is equally capable of providing this stable boost control at stock boost levels as well as extremely high boost levels associated with big-power builds.

The COBB Tuning 3-Port BCS features 1/8" low-profile barb fittings to keep the unit compact and are nickel coated for corrosion resistance. Optional 1/4" nickel plated fittings are also available separately. Viton spools and seals are used throughout for long life and lubricated with Dow Corning silicone grease. The manual override is sealed with an O-ring, the wiring harness is sealed to the casing using a waterproof grommet and the solenoid wires are ultrasonically welded to the coil, making the device waterproof and safe to wash. The BCS is rated to operate up to 120psi.

COBB Tuning has made the COBB 3-Port BCS installation as simple as possible. It mounts in the stock location and plugs directly into the stock wiring harness, making the physical install and electrical connection as simple as possible. The BCS comes with a custom aluminum mounting bracket, stainless steel hardware, boost-line to complete all connections and zip-ties to route the boost-line neatly through the engine bay. Installation Instructions are provided, are easy to understand, and provide routing instructions for both internal and external wastegate configurations.

Product Video

Specifications

Brand: COBB Tuning
Adjustable: Yes
Color: Blue
Number of Ports: 3
OEM Replacement: Yes
QTY: 1
Tuning Required: Yes
Mfgr. Warranty: 1 Year
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.
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REVIEWS & CUSTOMER MEDIA

27 Reviews
4.9 out of 5 Stars
5 Stars
(25)
4 Stars
(1)
3 Stars
(1)
2 Stars
(0)
1 Stars
(0)
Customer Photos and Videos
COBB Tuning 3-Port Boost Control Solenoid ( Part Number: 712750)
COBB Tuning 3-Port Boost Control Solenoid ( Part Number: 712750)
Great product 27 days ago
5out of 5stars

Super easy install, with great boost performance, with noticeable difference in smoothness! Much better than the stock 2 port !
  
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0 of 1 people found the following review helpful
Cobb three port EBCS 1 year ago
4out of 5stars

one size fits most type of product. The installation left a bit to be desired. I have an 03 WRX wagon. the OEM EBCS has rubber bushings insulating the solenoid from vibrations from the car. The Cobb is not drilled for those. I drilled them myself and installed the rubber solenoids on the mounting bracket. After that it was a fantastic install. Although I may have paid another $20 if Cobb would have chosen to include proper silicone hose and tiny hose clamps instead of the rubber lines (near the turbo heat zone) and zipties. once I flashed the ECU to the +EBCS map the car ceased all boosting issues! I can reach 15+lbs of boost on the OTS map.
  
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0 of 1 people found the following review helpful
Boost Control Solenoid 2 years ago
5out of 5stars

A must have.
  
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0 of 1 people found the following review helpful
Necessary in place of analog actuator.  2 years ago
5out of 5stars

Huge difference over stock. Boost comes on earlier and smoother. While the Cobb OTS tune works, I wouldn't run it for long without a custom tune. I saw small knock events with regularity until I switching to custom. Stage 1+EBCS felt equivalent to Stage 2 w/stock boost controller dyno tune to my butt. Very easy to install.
  
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3 of 3 people found the following review helpful
Love this ebcs, BUT 3 years ago
3out of 5stars

Originally purchased this ebcs back in january of 2016 for a motor build. Got it tuned and it ran flawlessly for 19 months of daily driving, approximately 23,000 miles. Buttery smooth boost delivery even with a larger turbo. Out of the blue it died completely and it sent me down the troubleshooting black hole. Car would only make about 6lbs of boost with a bpt 20g, no CEL or any other obvious issues. Eventually figured out the ebcs was dead and popped in a new one. All boost issues were resolved and I'm back to normal. Sucks that the warranty on this ebcs is only one year from cobb, but after a lot of searching on forums I could not find a single thread that mentioned a failed aftermarket ebcs. That being said I am sure that I am one of the very few that have run into one failing.
  
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QUESTIONS & ANSWERS

  • Q: Tuning  Reliable069 days ago

    I have an 06 wrx wagon with an nvidia turbo back exhaust and Perrin intake. No cobb access port or any other modifications to speak of. Can I put this on and go or do I need to get it tuned after installing this?
    • 1 of 1 people found the following answer helpful

      A:  No, you would 100% need a tune for this and i would highly recommend one anyway with the mods you have, Thanks!

      Rick C. @ RallySport Direct 4 days ago  
        
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  • Q: Running SD on 06 STI   bbostock18095611 month ago

    I’ll be running speed density on my 06’ STI and I have on of these boost controllers. My questions is how to hook it up when I don’t have a turbo inlet pipe, I’m just running a 4” filter right off the turbo. Is there a way around this?
    • 0 of 0 people found the following answer helpful

      A:  You would need to add a vacuum source pre-turbo somehow. Either buy a short extension between the turbo and filter, or tap into the filter body somehow. Thanks

      Rick C. @ RallySport Direct 1 month ago  
        
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  • Q: Upgraded turbo and EWG  Strycn1n37 months ago

    Will this work with an aftermarket turbo and external wastegate on a 2007 sti? Also is this ECBS controlled by the settings in the v3 AccessPort or does it require an external controller?
    • 0 of 0 people found the following answer helpful

      A:  This does work with an aftermarket turbo and wastegate, but it will require custom tuning, and will not work with an existing tune or OTS map.

      Marcus E. @ RallySport Direct 7 months ago  
        
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  • Q: Do I need a boost controller   SubieGuy311 months ago

    I’m currently running a stage 1+ tune on my 2016 wrx but when I finally get a j pipe for it I’ll be running stage 2 will I need a boost controller for that or will I only need one if I go get it pro tuned ?
    • 0 of 0 people found the following answer helpful

      A:  Cobb's OTS map will only work with the stock BCS, you'll only want this if you're getting pro tuned.

      Marcus E. @ RallySport Direct 8 months ago  
        
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