Grimmspeed Boost Control Solenoid - Subaru 15-21 WRX/FA20 [Full Kit] - 057041 335 Series 04-06 Subaru Impreza WRX STI

04-06 Subaru Impreza WRX STI 2

Water/methanol injection for gas engines is a proven means for effectively reducing engine inlet air temperatures and suppressing harmful detonation on forced induction and high compression naturally aspirated (NA) race engines

EG or DC2 LHD car

Longer spring for wider range of adjustment (40-130 PSI)

Grimmspeed Boost Control Solenoid - Subaru 15-21 WRX/FA20 [Full Kit] - 057041 335 Series 04-06 Subaru Impreza WRX STIAn Elegantly Engineered Solution. If you've been in the Subaru game for long, you're probably well aware that a 3 port Electronic Boost Control Solenoid (EBCS) is considered by most to be a 'must have' improvement before having your car tuned. GrimmSpeed has become the trusted brand in the EBCS market, with tens of thousands of solenoids in operation today across the globe. The 2015 21 WRX offers a unique change of pace, as the factory 2 port solenoid