EFI to Carburetor Regulator. EFI to carbureted regulator with 3/8-NPT ports. S New EFI-2-Carb Dual Stage Fuel Pressure Regulator P/N 13220 allows any car or truck, originally equipped with a return-style EFI powered engine, to affordably convert to a standard carburetor, all while retaining the full, stock, EFI fuel system components? All with a single […]