1Hassle Free Conversion: The dual stage fuel pressure regulator allows vehicles originally equipped with a return style EFI powered engine to easily convert to a standard carburetor, no changes to the original EFI fuel system are required to bolt on a carburetor and go. 2High Performance: Allows use of the stock EFI pump in the tank, the stock EFI supply and return lines, and the stock fuel filter. This dual stage regulator provides seamless control of bypass pressure to keep the EFI fuel pump happy while enabling full control of output pressure low enough. 3Precise Pressure Control: In the first stage, pump bypass pressure is adjustable from 816 psi. In the second stage, pressure to the carburetor is regulated and adjustable from 59 psi, bringing you excellent performance. 4Easy Installation: The regulator features universal, 3/8in NPT inlet, outlet, and return ports, making installation simple. The two 1/8in NPT gauge ports allow for easy monitoring and adjustment of pressures. Ordinary 3/8in NPT to AN, or 3/8in NPT to barb fittings may be used, 5Ideal Solution: No need to spend an arm and a leg, or countless hours, diagnosing and or repairing a complicated, worn out EFI system, the dual stage fuel pressure regulator offers a great solution to get your vehicle running again.