Part #: 20-0265-00
This kit is designed for use in the USDM 2008-2017 Subaru WRX STi (EJ257 only) and 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.
The Radium FPR kit replaces the factory regulator and re-routes fuel to cycle through the engine’s rails before reaching the regulator, and returning to the tank. This is the preferred fuel line routing by Subaru tuners trying to address stumbling issues.
The Radium Fuel Pressure Regulator offers adjustment from 20psi-up with a 1:1 vacuum reference. Interchangeable orifices allow the user to tune the regulator for any fuel pump flow.
The kit installs in the same location as the OEM fuel pressure regulator. Also included are vacuum hose and fittings to re-route the vacuum reference line from the #4 cylinder runner to the intake manifold plenum for a more stable vacuum signal.
The optional pressure guage kit 20-0386 can be installed into the unused 8AN ORB port on the regulator
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Note: Orders that contain more than one item will be assigned a processing date depending on the item.
Prior to shipping before shipping, we'll conduct a thorough inspection of the items you've ordered. The majority of orders are shipped within 48-hours. The estimated delivery time is between 3 and 7 days.
Returns
We are not able to manage the stock in our warehouse and factory. The actual levels of stock can change at any time. Be aware that it's possible for your order to be out of stock after you have made the order.
Our policy lasts thirty days. If you don't receive the product within 30 days, we're not able to provide the option of a refund or exchange.
The item cannot be in use and must be in its original condition. It must also be in the original packaging.
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