Review on 🔥 Holley 12-803 Reg, Fuel Pressure 4.5-9 Psi, Shiny: The Ultimate Fuel Pressure Regulator for High-Performance Engines by Johnnie Trimble

The controller works fine. I had to use a faucet to clean out the holes/threads that attach it to the bracket. At first it seemed like there were no threads until I realized it was some sort of white solid. Maybe it's the manufacturing process. The first time I applied pressure I realized I had to adjust the pressure as it was too high. The adjustment screw has been overtightened. Worried it wouldn't come loose unless the bolts were removed from the inner fender where I installed it. It took a bit of work, but I finally figured it out and made the necessary adjustments.