Radium/Injector Dynamics Subaru Fuel Rail upgrade 01+ WRX STIPremium fuel rail upgrade for 2001+ Subaru WRX and STI models. Engineered by Radium Engineering in collaboration with Injector Dynamics for superior fuel delivery in high performance and forced induction applications. Key Features CNC machined billet aluminum construction for durability and precision Optimized for Injector Dynamics injectors (ID1050, ID1300, ID2000, etc.) Improved fuel distribution across all cylinders Increased internal volume for
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Radium/Injector Dynamics Subaru Fuel Rail upgrade 01+ WRX STI