GrimmSpeed Boost Control Solenoid for Subaru Models Vehicle Fitment::2008+ STi (057007) 50% greater capacity than stock

50% greater capacity than stock plastic expansion tank

The integrated regulator on the FST-R can be vacuum referenced if 1:1 fuel pressure is required or ran static to mimic the stock system

• Clears Room for Larger Turbos

these are also sold as single replacements

Includes five 9° cuts

GrimmSpeed Boost Control Solenoid for Subaru Models Vehicle Fitment::2008+ STi (057007) 50% greater capacity than stockThe GrimmSpeed 3 port electronic boost control solenoid (EBCS) for Subaru WRX, STi and Legacy GT models will allow for extremely high resolution boost control, providing your tuner with the hardware they need to safely tune your car with rock solid boost levels. You'll be able to spool your turbo quicker and maintain tight control of boost levels throughout your power curve. In addition, this solenoid features a balanced valve to withstand up to