The TurboXS Boost Solenoid is an excellent upgrade for your FA20 WRX.  It enables precise boost control and is easy to install mounting in the stock location and plugging directly into the stock harn.     ...
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GrimmSpeed 17-21 Subaru WRX (FA20) Boost Control Solenoid (Canadian Fitment Only)17-21 Subaru WRX (FA20) Boost Control Solenoid (Canadian Fitment Only)
The latest iteration of GFB’s feature-packed electronic boost controller now has the ability to monitor and display your engine’s air/fuel ratio in either Lambda or AFR. By connecting the analogue output of most wideband O2 controllers (i.e. Innovate LC-2, AEM UEGO etc, sold separately) to the G-Force III’s auxiliary input, you can toggle between boost pressure and air/fuel ratio display. Not ...
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GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+GrimmSpeed Boost Control Solenoid - Subaru WRX 2015+