FP10142 Delphi Fuel Pressure Regulator Gas New for Hardbody Truck Nissan D21. Delphi Fuel Pressure Regulator. DELPHI OE REPLACEMENT FUEL PRESSURE REGULATORS. Improve your ride’s fuel economy and drivability with Delphi’s OE replacement fuel pressure regulators. Outfitted with precision-manufactured parts and strictly flow tested and factory calibrated, these fuel pressure regulators ensure correct and steady […]