The Hyperfuel™ modular EFI -6AN fuel pressure regulator is the ultimate fuel pressure regulator supporting up to 650HP and can handle high flow EFI fuel pumps. Featuring the capability to interchange between carbureted and EFI applications with the switch of our interchangeable service kits. This regulator performs for both naturally aspirated and boosted applications providing performance and dependability. If you are looking for a regulator to do it all, the modular fuel pressure regulator is your answer. Base pressure is adjustable from 35-75 PSI.