Review on Holley HOL 12-804 12-804 Fuel Pressure Regulator: Optimal Performance and Fuel Efficiency by Devin Tanner

This little guy fixed fuel problems with a secondary carburetor on a Willys Jeep. I was able to reduce the fuel pump pressure from 7psi to 2psi and time the carburetor properly. After confirming the fuel pressure, I removed the pressure gauge (sold separately) and installed a 3/8" 18 NPT industrial magnetic (female head) IP-03 drain plug on the second outlet. Adding a 3/8" drain plug Mini Ball Stainless Steel Valves (316) - FxM NPT on the inlet allowed me to use the fuel cut off. The 3/8" inlets were problematic for my application (1/8" on a vehicle) but I found the fittings I needed online Granger.