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2015-2021 Subaru WRX 3-Port Boost Control Solenoid By Grimmspeed (057041)
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 GrimmSpeed's 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 addition of the GrimmSpeed BCS shows much tighter boost control and consistency. This is safer for your car and easier for your tuner.
057041 Features
Custom Machined Adapter Makes use of the factory inlet recirculation port, instead of blocking it off
Black Anodized Finish & Protects the assembly from corrosion in an extremely demanding environment
3-Port Solenoid - Proprietary internal modifications prepare the solenoid for extreme conditions below the vehicle
Plug-n-Play Wiring Connector - Plugs directly into the factory wiring harness with no modification required
Compact Design - No need to mount the solenoid elsewhere in the engine bay, increasing complexity and hose length
1/4in Barbed Fittings - Matches the factory turbo and waste gate hose size
Please Note:
Because this upgraded solenoid affects the way that your vehicle controls boost (that's the point!), it is always recommended that you consult with a tuner immediately following installation. It is not recommended that you drive the car in a way that builds boost without doing so.
Applications
2015-2021 Subaru WRX
What's in the Box?
GrimmSpeed 3-Port Boost Control Solenoid w/ Plug-n-Play Connector
Machined and anodized turbo inlet adapter w/ VITON O-Ring
Laser Cut and CNC bent steel bracket, black zinc plated w/ stainless press-in nuts
Zinc plated barbed fittings, preassembled w/ anerobic sealant
2ft of 1/4in Vacuum Hose w/ zipties
All necessary hardware
Warranty
Limited Lifetime Warranty