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  Catalog > 2015+ WRX > Turbos & Boost Management > Boost Control Solenoids > GrimmSpeed Turbo Inlet Adapter FA20 2015+ WRX Part# 057047
Description
 
This product is not for use with the stock 2015 WRX turbo or other stock replacement turbochargers. This solenoid is for aftermarket turbo kits and as such, does not include the required adapter for the stock FA20 turbo inlet.

The advantages of a 3-port boost control system vs. the factory 2-port system are readily apparent during the tuning process. The 3-port systems works by interrupting the boost signal traveling from the turbo to the wastegate. That boost is redirected back into the turbo inlet and re-ingested by the turbo using our machined adapter. This is important, as the factory Mass Airflow Sensor has already measured that air and is expecting that your motor will use it during combustion, rather than venting it to the atmosphere. The factory configuration simply 'bleeds' the signal from between the turbo and wastegate, which creates a system that is a bit less complex, but reacts more slowly and with less precision. The chart above shows two boost plots. The 'before' is our 2015 WRX, dyno tuned by a third party protuner. The 'after' is the exact same tune, but after the installation of the GrimmSpeed 3-Port BCS. As you can see, the addition of the GrimmSpeed BCS shows much tighter boost control and consistency. This is safer for your car and easier for your tuner.
 
Details
 
SKU:gs057047
Price:$ 37.00
 
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