No matter the application, the Aeromotive X1 Carburetor Bypass Regulator provides dependable fuel pressure regulation. If you are making the change from a carburetor to EFI or vise versa there is no longer a need to purchase a new regulator. Simply utilize the Aeromotive 13304 conversion kit. Replace original X1 Series regulator internals with the 13304 X1 conversion kit, and you have a regulator with vastly different characteristics. The X1 Series provides flexible performance that grows as your fuel system grows.