Fuelab digital fuel pumps, fuel pressure regulators and accessories - for the best fuel supply fuel pressure regulator -6AN 515 Fuel pressure regulator with the highest precision FueLab - Fuel supply at the highest level Intake: -6AN Pressure: 1,7 - 6 Bar Inlets: 2 Connection dimensions: -6AN Return The FueLab 515 fuel pressure regulator series was designed with the idea of power and flexibility. They support both carbureted and fuel injected engines, from 0.15 to 8,5bar. The return is on the underside of the controller.