Radium's redesigned direct mount EFI fuel pressure regulator is the compact solution for many high performance applications. Can regulate single and multiple fuel pump setups. Tool-free pressure adjustment. Swiveling design. Two 1/8NPT ports for pressure sensor or gauge installation. E85 compatible.Designed for all EFI applications. Minimum pressure is determined by pump flow output and return line restriction. Max pressure is determined by fuel pumps maximum pressure.