From carbureted to EFI pressures, naturally aspirated or forced induction, the Aeromotive X1 Series fuel pressure regulators are designed to span the entire range of applications, providing dependable fuel pressure regulation. Are you making the change from a carburetor to EFI or EFI to a carburetor? There is no longer a need to purchase a new regulator. Simply utilize one of three conversion kits (sold separately) to match the operating range required of your engine. While versatility is one of the X1 Series fuel pressure regulators' greatest assets, it is far from the only new design feature. They utilize larger -8 AN inlet/outlet ports to accommodate increased flow and even reduce overall weight by 33 percent! Even with these new design components, none of the traditional features expected of a genuine Aeromotive product has been neglected. Still integrated are the 1/8 in. NPT gauge port and 1:1 ratio boost reference port for an easy forced induction connection. The Aeromotive X1 Series fuel pressure regulators provide flexible performance that grows as your fuel system grows.