Description
Radium Engineering FPR Kit for Subaru STI (2008-2021)
If you own a 2008-2021 Subaru WRX STI with the EJ257 engine, youre in for a treat with the Radium Engineering FPR Kit. This kit is specifically tailored for your vehicle, replacing the factory fuel pressure regulator and damper assembly, ensuring a seamless fit and improved performance.
Why Upgrade?
The stock fuel line setup in your STI uses a quasi dead-end system that can lead to some frustrating stumbling issues. With the Radium FPR Kit, fuel is re-routed to flow through the engine’s rails before reaching the regulator and returning to the tank. This change is a go-to solution for Subaru tuners who want to optimize their vehicle’s fuel delivery.
Adjustable Performance
The Radium Fuel Pressure Regulator is designed to provide adjustable pressure from 20 psi upwards, complete with a 1:1 vacuum reference. Plus, with interchangeable orifices, you can easily tune the regulator to match your specific fuel pump flow needs. Its all about giving you control over your ride!
Easy Installation
Worried about installation? Dont be! This kit fits right where the OEM fuel pressure regulator was located. Along with the regulator, youll find vacuum hoses and fittings included, allowing you to re-route the vacuum reference line from the #4 cylinder runner to the intake manifold plenum. This setup ensures a more stable vacuum signal for your STI.
Optional Pressure Gauge
If you want to keep a close eye on your fuel pressure, consider adding the optional pressure gauge kit (20-0386) that can be easily installed into the unused 8AN ORB port on the regulator.
Important Considerations
- < li >While this high-flow pressure regulator is a fantastic upgrade, keep in mind that the OEM venturi jet pump can still be a bottleneck. Upgrading your OEM fuel pump unit is recommended.
< li >If you experience oscillations due to this restriction, plumbing a fuel pulse damper in the return line can help smooth things out.
Fitment
- < li >Subaru STI 2008-2021
Ready to take your Subaru STI to the next level? The Radium Engineering FPR Kit is here to help you achieve just that!
WARNING: Cancer and Reproductive Harm
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