Turbo XS 15-21 Subaru WRX FA20 Boost Control Solenoid Kit Other Electronics Stuff High RPM normally translates into

High RPM normally translates into efficient scavenging of air-flow but during misfires or incomplete flame propagation

you must also purchase the oil pump chain tensioner

it is not the best option for high horsepower builds and hard driving

Our Flow Control Valves are still a significantly less sensitive system than the factory delay valve

Turbo XS 15-21 Subaru WRX FA20 Boost Control Solenoid Kit Other Electronics Stuff High RPM normally translates intoFITS: 2015 2021 Subaru WRX The TurboXS Boost Solenoid is an excellent upgrade for your FA20 WRX. It enables precise boost control and is easy to install mounting in the stock location and plugging directly into the stock harn.