Features: 1.Part Number: Fuel valve switch replace part number is 12 803 for reference. Please check the part numbers whether it suits your engine. 2.Applicable: Fuel pressure regulator with 3/8in NPT in and out ports, designed to adjust the fuel pressure requirements of various carburetors. 3.4 1/2?9 PSI: Fuel pressure regulator can be adjusted from 4 1/2 to 9PSI, which allow you can adjust fuel pressure to your engine easily. 4.Usage: Fuel valve designed to precisely control the fuel pressure from pump to the carburetor, prevent overload, flooding or drivability problems. 5.Zinc Alloy: Fuel pressure regulator made of zinc alloy material, with chrome plated, which includes mounting and fixing screws for easy intall. Specification: Item Type: Carburetor Fuel Valve_x000D_ OE Number: 12-803_x000D_ Material: Zinc Alloy, Chrome Plated Surfaces_x000D_ In/Out Port: 3/8in NPT_x000D_ Adjust Pressure Range: 4.5-9 PSI_x000D_ Applicable: Designed to adjust the fuel pressure requirements of various carburetors (not compatible with alcohol) PackageList: 1 x_x000D_ _x000D_ Carburetor Fuel Valve 3 x Setscrew Note: Please double check the part number of your item, matching information is for reference only._x000D_ If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!