PHENIX INDUSTRIES F50106-3 ADJUSTABLE EFI FUEL PRESSURE REGULATOR W/ GAUGE + /8AN FITTINGS. Our goal is to design higher quality, better performing, and affordable fluid control products for use in the automotive, racing, and hydraulic industries. Boost Referenced 1:1. 1 The regulator is designed with a threaded adjuster and locking nut at the top which alters the preload on the internal spring. Increasing the preload will increase the pressure. 2 Vacuum port provides the boost/vacuum pressure to the top of the regulator. 3 Pressure port for attaching a fuel pressure gauge or sensor. O-Ring should be facing the regulator side. 5 Excess fuel port. ORB fitting allows the bypassed fuel to return to the surge tank, fuel tank, or fuel cell. What differentiates us from other sellers? Secondly, we are members of the Specialty Equipment Manufacturers Association (SEMA) and our research into fuel system fitment and design ensures you are receiving a quality product that fits the first time and lasts the life of the vehicle. Payments are processed securely through Authorize. Net. Phenix fuel pressure regulator fittings fuel pump pompa di carburante pompe? Á carburant Kraftstoffpumpe Benzinpumpe bomba de combustible pompa bahan bakar.