TurboXS Electronic Boost Control Solenoid 2002-2007 WRX
Here, you are looking at the Turbo XS 2002-2007 Subaru WRX Boost Control Solenoid.
This item is designed to replace the factory 2 port boost solenoid with a 3 port.
This part is required for proper boost control on your WRX when using an aftermarket Downpipe or Upgraded Turbocharger.