Holley 12-803 Fuel Pump Fuel Pressure Regulator
This regulator is used to adjust to fuel pressure requirements of various carburetors and supplies the proper pressure to the needle and seat valve to prevent flooding or drivability problems. This satin finish regulator feature 3/8 pipe thread outlet ports with 7/32" restriction. It regulates pressure from 4-1/2 to 9 PSI and is designed to work with a single carburetor installation.