Delphi FP10560 Fuel Injection Pressure Regulator. Fits what vehicles: 1978-1981 BMW 633CSi, 1978-1981 BMW 733i, 1979-1981 BMW 528i. Precision is key for the fuel pressure regulator on any vehicle. At Delphi Technologies, we use OE engineering to test our regulators and fuel technologies to ensure the utmost performance and durability.