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GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+
GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+
GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+
GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+
GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+
GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+
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User Media for: GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+

GrimmSpeed Boost Control Solenoid

Subaru WRX 2015+


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11 hrs 34 mins
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Features & Product Details

RallySport Direct proudly carries a great selection of quality performance upgrades by our friends over at GrimmSpeed.


This is the GrimSpeed Electronic Boost Control Solenoid. This is one of GrimmSpeed's most utilized upgrades due to the durability, simplicity of use, and the performance it delivers. This is a must-have for those of you who are getting your vehicle fine-tuned outside of the capacities of the factory 2-port boost control unit. The 3-port system works by interrupting the boost signal that travels from the turbocharger to the wastegate. The factory system will 'bleed' the signal between the turbocharger and the wastegate which will create a system that reacts slowly, and with less precision. The GrimmSpeed BCS will provide a much tighter boost control and consistency that makes life easier for the tuner as the boost control will be more prompt and precise. 




  • Includes 1/4" barbed fittings to match the factory turbo and wastegate hose size
  • The proprietary internal modification design prepares the solenoid for extreme conditions below the vehicle
  • Plug and play operation directly into the factory wiring harness with no modification required
  • Custom machined adapter makes use of the factory turbo inlet recirculation port instead of blocking it off 
  • Provides a quicker, and more precise boost control response
  • Makes tuning more simple and direct for the tuner
  • Includes the 3-port boost control solenoid
  • Includes a machined and anodized turbo inlet adapter with Viton O-ring
  • Includes the plug and play connector
  • Includes a laser cut and CNC bent steel bracket that is zinc plated with stainless press-in nuts
  • Includes zinc-plated barb fittings that are preassembled with anaerobic sealant
  • Includes 2-feet of 1/4" hose and zip ties
  • Includes all of the rest of the necessary hardware for the installation




  • This will only fit cars with the factory composite turbo inlet
  • Product Video


    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



    4 Reviews
    5 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    GrimmSpeed Boost Control Solenoid ( Part Number: 057041)
    Makes Tuning Easier  4 years ago
    5out of 5stars
    Mr. Means
    My Tuner recommended this as a way to better Tune my car. Again Grimmspeeds quality is the best.
    Was this review helpful?
    Good product  5 years ago
    5out of 5stars
    Install wasn't bad takes more time to take off and put back on the under panel. Dont use this part without tuning, once done boost delivery is great.
    Was this review helpful?
    Best Solenoid on the Market 5 years ago
    5out of 5stars
    Nothing else needs to be said really. Install isn't too bad at all. Car is now protuned and utilizing this solenoid and everything is just so fluent and responsive. Grimmspeed is nothing but the best.
    Was this review helpful?
    Awesome Product 5 years ago
    5out of 5stars
    Tyler G.
    It is Grimmspeed, nothing else needs to be said… This is Grimspeed’s bread and butter, nobody asks “what solenoid should I run” because everyone runs the Grimmspeed solenoid without question… because it is the most reliable and the best on the market. I don’t need to go over how great they package it and how the finish on it is perfect, that just comes with their products.
    Was this review helpful?


    • Q: Boost Solenoid with Catless J pipe?  Mr. Means5 years ago

      Will installing this allow me to use a catless J pipe with my 2016 WRX safely without boost creep/ over boost and drivability issues?
      • 0 of 0 people found the following answer helpful

        A:  Yes it will make running a catless product safer, but you will need a professional tune with this part.

        Tyler A. @ RallySport Direct 5 years ago  
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    • Q: Fitment 2011 Legacy 2.5GT  StreetSolutions6 years ago

      Hello, would it also fit the 2011 Legacy 2.5GT?
      • 0 of 0 people found the following answer helpful

        A:  This will not bolt on to the '11 LGT. The turbo inlet designs are slightly different, and the BCS will not clear. For that vehicle, you will want to use PN 057046 and PN 057047. That setup will be the adapter plate along with a solenoid that mounts independently of the plate. -Andy

        GrimmSpeed @ GrimmSpeed 6 years ago  
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