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Subaru WRX STI 2015-current
and an O-ring sealed dipstick
Included are two M5x0
Faster communications than G4+ models
n inlet port flange
Radium Fuel Pressure Kit 08-21 Subaru Sti Black radium ls9 fuel rails Subaru WRX STI 2015-currentThe Radium engineering 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
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