Radium FPR Kit Black - 2008-2021 Subaru STI

The Fuel Pressure Regulator Kit will come in a black finish to improve the fuel pressure adjustments in the Subaru WRX/STI.

RallySport Direct carries highly engineered products designed to improve the performance and longevity of your vehicle brought to you by Radium Engineering. 

 

This is The Radium Engineering Fuel Pressure Regulator Kit. This particular kit has been designed to be used in the USDM 2008-2021 WRX/STI EJ257 models, and it replaces the OEM fuel pressure regulator and damper assembly. The factory STI fuel line routing uses a quasi-dead-end system that circulates fuel through the regulator and bypasses the engine. Fuel is only routed to the engine when there

 

HIGHLIGHTS:

• Black finish 
• Designed to work with the USDM 2008-2021 WRX/STI EJ257 models
• Replaces the OEM fuel pressure regulator and damper assembly
• Replaces the factory regulator and re-routes fuel to cycle through the engine's rails before reaching the regulator and returning to the tank
• Offers adjustment from 20 psi and up with a 1:1 vacuum reference 
• Interchangeable orifices allow the user to tune the regulator for any fuel pump flow
• Installs in the same location as the OEM fuel pressure regulator
• Includes vacuum hose and fittings to re-route the vacuum reference line from the #4 runner to the intake manifold plenum for a stable vacuum signal