Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel Pressure Regulator Kit
Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel Pressure Regulator Kit is backordered and will ship as soon as it is back in stock.
Short Description
Short Description
Pickup available at SHOP HQ
Usually ready in 5+ days
Delivery and Shipping
Delivery and Shipping
Domestic orders for in-stock items typically arrive within 5-10 business days, while international orders for in-stock items may take 12–15 business days.
If an item is out of stock or back-ordered, we will contact you within 3–5 business days with an estimated time of arrival (ETA) or alternative options before the order is fulfilled.
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Price Match Guarantee
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Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel...
Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel Pressure Regulator Kit is backordered and will ship as soon as it is back in stock.
Description
Description
For a properly planned performance build, the Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel Pressure Regulator Kit controls EFI fuel pressure and returns excess fuel so injectors see a stable, tunable pressure supply. Radium regulators are intended for performance return-style systems where consistent pressure control is important as fuel demand and manifold pressure change.
Fitment is specific to 08-21 Subaru WRX STi (EJ257 Only) RA-Series; confirm the vehicle and surrounding hardware before ordering. A fuel return must be routed back to the tank or surge tank. Match regulator port sizes and pressure range to the fuel-system design.