Radium Engineering Fuel Pressure Regulator Kit Black 2008-2021 STI YMM_2001_Legacy which is engineered primarily for

which is engineered primarily for light to moderate driving conditions and features softer bushings that allow excessive drivetrain movement

The package includes stainless steel spacers

1× Perrin TMIC Throttle Body Coupler

Exhaust gasses are guided through 3-inch diameter tubing into the center inlet of the fully-24-inch wide muffler section

Radium Engineering Fuel Pressure Regulator Kit Black 2008-2021 STI YMM_2001_Legacy which is engineered primarily forUpgrade your fuel system with the Radium Fuel Pressure Regulator (FPR) Kit, designed specifically for USDM 2008 2021 Subaru WRX STi models with the EJ257 engine. This kit replaces the OEM fuel pressure regulator and damper assembly, optimizing fuel rail flow and improving stability under high performance conditions. The Radium FPR kit reroutes fuel through the fuel rails before returning to the tank, promoting smoother fuel delivery and eliminating