Radium FPR Kit Black - 2008-2021 Subaru STI

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

Radium Engineering Fuel Pressure Regulator Kit Black

---

SPECS:

• 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