GrimmSpeed
GrimmSpeed 3-Port Electronic Boost Control Solenoid - Universal
Regular price $109.00Unit priceGrimmSpeed
GrimmSpeed 3-Port Boost Control Solenoid - Solenoid Only - 2015-2021 WRX
Regular price $140.00Unit priceGrimmSpeed
GrimmSpeed 3-Port Boost Control Solenoid - 2002-2005 Subaru WRX
Regular price $140.00Unit priceGrimmSpeed
GrimmSpeed 3-Port Boost Control Solenoid - 2015-2021 Subaru WRX - Canadian Inlet
Regular price $200.00Unit priceGrimmSpeed
GrimmSpeed V2 Bypass Valve - 2004-2021 Subaru STI / 2002-2007 WRX
Regular price $299.00Unit priceGrimmSpeed
GrimmSpeed V2 Bypass Valve - 2008-2014 Subaru WRX / 2005-2009 Legacy GT
Regular priceFrom $279.00Unit priceGrimmSpeed
GrimmSpeed Turbo Inlet Boost-Control Solenoid Adapter - 2015-2021 WRX
Regular price $46.00Unit priceGrimmSpeed
GrimmSpeed Electronic Boost Control Cover - 2008-2021 Subaru STI
Regular priceFrom $59.00Unit priceGrimmSpeed
GrimmSpeed 3-Port Electronic Boost Control Solenoid - 2004-2007 STI / 2006-2007 WRX
Regular price $140.00Unit priceGrimmSpeed
GrimmSpeed 3-Port Electronic Boost Control Solenoid - 2008-2014 Subaru WRX
Regular price $145.00Unit priceGrimmSpeed
GrimmSpeed 3-Port Electronic Boost Control Solenoid - 2008-2021 Subaru STI
Regular price $140.00Unit priceGrimmSpeed
GrimmSpeed V2 Bypass Valve - 2015-2021 Subaru WRX / 2014-2018 Forester XT
Regular price $299.00Unit priceGrimmSpeed
GrimmSpeed 3-Port Electronic Boost Control Solenoid - 2015-2021 Subaru WRX
Regular price $189.00Unit price
A 3-port boost control solenoid gives a tuner tighter control than the stock 2-port unit, but the tune has to be adjusted for it. A stronger bypass valve or blow-off valve holds boost better on a tuned car. A vent-to-atmosphere blow-off valve can upset the idle on MAF-based cars unless the tune accounts for it, so check before you buy one.
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