Fit For Delphi Fuel Injector Common Rail Nozzle Control Valves. OEM NO.: 9308-621C 28239294 9308z621c Petrol Injection Nozzles can Precise control of fuel injection to ensure the normal operation of the engine under different working conditions. The internal seal ring helps decrease fuel contact and maintains consistent operation over time with robust construction. Made from quality materials, the nozzle provides strong resistance to aging, reliable strength, and extended durability for dependable performance.