Fuel injection fuel pressure regulator by Professional Products 10670. Designed for use on regular EFI systems requiring one feed line to the fuel rails and one return line to the fuel tank. Wrench flats on outlet prots make it easy to install fittings. The bottom port is the bypass back to the fuel tank. Two ports on the sides can be either an inlet or outlet. Fuel pressure will rise on 1:1 ratio when referencing boost. Adjustable from 25 psi to 75 psi. Features one 1/2" NPT return port and two 3/8" inlet/outlet ports. Flows 200+ gallons per hour. Restriction is .437 (7/16"). Has a 1/8" NPT port for fuel pressure gauge installation. Comes with stainless steel bracket and screws. Blue anodized finish. fuel injection fuel pressure regulator Professional Products 10670 10670 Check out our selection of fuel blocks and fuel Ys, fuel lines and fuel injection fittings. Check out our large selection of electric fuel pumps from Holley, Edelbrock, MSD, Magnafuel, Aeromotive, Barry Grant and more! We have a big selection of fuel filters for all applications. Check them out! We welcome CANADIAN customers! For ordering information, click on "Canadian Order Info" at the top left side of this page. LOW COST SHIPPING! Just $12.95 to ship your entire order by U.P.S. ground within the continental United States. Purchase any quantity of items and you pay just $12.95 to have it shipped! The more you order, the more you save! (Orders to Hawaii, Puerto Rico, Virgin Islands, and some parts of Alaska will have additional shipping charges. Customers located in these areas will be emailed the shipping costs for approval before we ship the order.) We use Postal Priority for APO and FPO addresses only. Additional shipping charges may apply to these addresses.