3-Port Electronic Boost Control Solenoid
Fits: 08-21 STI
Auto Parts Store of the Year 2026
Estimated Shipping Widget will be displayed here!
Talk to an Enthusiast
Verify Fitment & Product Recommendations
M-F 8:30AM - 5:00PM
Fitment
Fitment
- 2008–2021 Subaru | WRX STI
Description
Description
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.
DETAILS:
Shipping and Delivery
Shipping and Delivery
Review our Shipping Policy for delivery details, shipping costs and exclusions.
Warranty and Support
Warranty and Support
Return and Refund
Return and Refund
Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.
Proposition 65
Proposition 65
Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov
![Grimmspeed [08 - 21 STI] 3 - Port Electronic Boost Control Solenoid | 057007 - JDMuscleBoost Control Solenoidsgrm057007](http://jdmuscleusa.com/cdn/shop/files/grimmspeed-08-21-sti-3-port-electronic-boost-control-solenoid-057007-2664053.jpg?v=1770328225&width=1445)