AEROMOTIVE 13139 EFI Fuel Pressure Regulator 2 -08 inlets 1-06 return 40-75psi High Performance, adjustable EFI regulator designed for medium to high horsepower applications. This regulators features Aeromotive's high-flow design, superb pressure control and legendary durability. -Engineered for A1000 class and smaller pumps. -Gas, ethanol, methanol and diesel compatible. -40-75 PSI adjustable base pressure range. -1:1 vacuum/boost reference capability. -1/8 NPT dedicated gauge port.