Fuel Injection Pressure Regulator Delphi FP10455 fits 99-05 Mazda Miata 1.8L-L4. See our other listings. EST, MON to FRI. Fuel Injection Pressure Regulator. 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. […]