Fuel Injection Pressure Regulator 0438161001Precise and Stable Fuel Pressure: suppresses high frequency pressure pulses generated by the fuel pump, ensuring that the injector nozzles inject fuel at a constant pressure, improving combustion efficiency and power output stability Extends the life of the fuel system: reduces the pressure load on components such as fuel pumps, injectors and fuel rails, especially for vehicles with high mileage or high performance operating conditions Part Number: