Name: Radium Engineering FPR Kit Green Subaru STI 2008-2021
Brand: Radium Engineering
SKU: 154884537
Price: 269.95 USD

This kit is designed for use in the USDM 2008-2021 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.

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.

NOTE:

While this is a high flow pressure regulator, the fuel system is still at mercy with the restrictive OEM venturi jet pump. It is recommended to upgrade the OEM fuel pump unit. Alternatively, plumbing a fuel pulse damper in the return line will help with oscillations created by this unwanted restriction.

Fitment:

Subaru STI 2008-2021

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Make Vehicle	Model	Submodel	Year	Engine	Notes
2008-2021 Subaru STI	STI		2008-2021

Who is Radium Engineering?

Radium Engineering is a company that was founded in 2010. The company specializes in designing and producing some of the best aftermarket products in the market. They have produced parts used by various racers and motorsport enthusiasts worldwide. Today, they have established a name for themselves and have become a brand synonymous with performance.

Quality in Every Product

All of their products are done in house, from research and development, design and manufacturing. They use the latest computer simulation and modeling tools that allow them to create an accurate and precise model. After all is done, they subject their products to an extensive testing procedure to ensure that it is safe to use and performs the way it is designed to.

Not Your Ordinary Stock Parts

The company focuses on manufacturing race-oriented parts and accessories such as surge tank lines and PCV oil catch can systems. They also offer fuel fittings, fuel manifolds, pumps, and fuel regulators designed for high performance applications. All their parts are made out of high quality materials that can withstand extreme forces.

Purchase Radium Engineering Products At Vivid Racing

If you are in search of a high quality fuel system component for your vehicle, then Radium Engineering is the brand for you. Specifically made for high-performance applications, they are the trusted brand of top racers from different racing disciplines everywhere. To know more about Radium Engineering, visit Vivid Racing and check out their list of products that fit your specific needs.

Warranty

All Radium Engineering brand products are subject to a 1 Year Limited Warranty from the date of original purchase. If a product fails, it will be repaired or replaced at Radium Engineering's option when it has been determined by Radium Engineering to have failed due to defects in materials or workmanship. Warranty claims must be made by the original purchaser. If the purchase was made from a retailer other than radiumauto.com, please contact the place of purchase for further assistance.

This warranty is limited to repair or replacement of the merchandise only and shall not, in no event, exceed the original purchase price. Radium Engineering will not be held responsible for secondary or consequential damages or costs (including labor, towing, etc.) incurred due to failure of this product. Standard ground shipping is used for all warranty transactions. Expedited shipping is available, but the cost difference must be paid by the end user in advance of the shipment.

Warranty claims must ship pre-paid to Radium Engineering for review. Claims must include the failed part(s), RMA number, and original proof of purchase. If the claim is missing any of these items, it may be rejected and returned to sender. Product must be received by Radium Engineering within 14 days of RMA's issue date. Please note that before Radium Engineering can issue an RMA for any product, it is first necessary for the installer or end user to contact info@radiumauto.com to discuss the problem. Most issues can be resolved via email. Under no circumstances should a product be returned or a RMA requested before the above process transpires.

This warranty applies to the original purchaser only and is non-transferable. Improper use, installation, modification, abuse, or unauthorized repairs or alterations voids this warranty. Credit for defective products will be issued pending inspection by Radium Engineering. This warranty does not extend to third party products often used in Radium Engineering products, such as fuel pumps, turbochargers, or any other non-Radium Engineering brand products.