Radium Engineering RA-Series Fuel Pressure Regulator Kit - Fits 08-21 Subaru STI subaru-wrx-2016 The Washer Reservoir consists of

The Washer Reservoir consists of a tubing extension

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Radium Engineering RA-Series Fuel Pressure Regulator Kit - Fits 08-21 Subaru STI subaru-wrx-2016 The Washer Reservoir consists ofThis kit is designed for use in the USDM 08 21 Subaru WRX STi (EJ257 only). It replaces the OEM fuel pressure regulator and damper assembly, shown below. The factory STi fuel line routing uses a quasi dead end system that circulates fuel through the regulator, bypassing the engine. Fuel is only routed to the engine when there is demand.