The FASS Fuel Systems Adjustable Fuel Pressure Regulator is intended for aftermarket performance applications requiring higher fuel pressures than a typical daily driver. These applications can vary from drag race vehicles, competition pulling trucks or high performance marine applications. For your convenience we have pre-drilled and tapped a fuel pressure gauge port that will make adjusting your regulator simple, eliminating any guess work. As an added performance benefit, we have also engineered a boost compensation port. This will allow you to run a line from your manifold to increase fuel pressure, very beneficial when under active acceleration and fuel demand has been increased.