Aeroflow Carburettor/EFI 3-Port 800hp Billet Fuel Pressure Bypass Regulator 3-60 psi Adjustable (AF66-2059)8ORB EFI CARB PRESURE REGUL Polished Finish. 3 x 8 ORB Ports & 1 x 1 8" NPT Port Part Number: AF66 2059 Billet 3 port EFI regulators. Made from billet 6061 T6 aluminium these regulators are an ideal upgrade for the Carburettor orEFI fuel systems. Will supportup to 800hp. Ethanol, methanol& unleaded compatible. These regulators have have 2 x 8 ORB inlet outlet ports, 1 x 8 ORB return line port and 1 x 1 8" NPT pressure gauge port. Adjustable from 3 20