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The Radium Engineering RA‑Series Fuel Pressure Regulator Kit for 2008–2021 Subaru WRX STi (EJ257) provides adjustable fuel pressure control and is ideal when combining multiple fuel pumps into a single feed line. Black anodized for corrosion resistance, the vehicle‑specific kit integrates with EJ257 fuel systems to offer a compact regulator solution for upgraded fueling setups and multi‑pump installations.
Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel Pressure Regulator Kit
