Subaru WRX & STi ('07&up)Fuel Injector Clinic Injector Set (and fits '04-'06 STi with WRX tumbler conversion): Saturated / High Impedance Ball & Seat Injectors. Utilizing the latest injector technology and featuring state of the art matching with Data Match Technology . Includes pigtails PGTJETR4Q or add Plug & Play adaptors PADPJtoD4.