GrimmSpeed 3-Port Electronic Boost Control Solenoid Subaru STI 2008-2021 | 057007 Stockdrain Accurate air/fuel ratio monitoring is

Accurate air/fuel ratio monitoring is essential for performance tuning and engine reliability

works great

making for more consistent clamping

Part #: 6388

Part #: FOM-FMPAC350Z

GrimmSpeed 3-Port Electronic Boost Control Solenoid Subaru STI 2008-2021 | 057007 Stockdrain Accurate air/fuel ratio monitoring isFitment Information: 2008 2021 Subaru STI Features: The GrimmSpeed Boost Control Solenoid is the most complete and easy to use 3 Port Electronic BCS. Unlike your OEM 2 port solenoid, the GrimmSpeed BCS will allow for extremely high resolution boost control at elevated boost pressures, providing your tuner with the hardware needed to safely tune your car with rock solid boost levels. Using our solenoid, you are able to spool your turbo quicker and