Add to Favorite Sellers. 25-305BK AEM Universal Adjustable Fuel Pressure Regulator – 40-130 PSI. Inlet: 2 x -6AN (9/16-18) Outlet: -6AN – Gauge Port: 1/8 in. NPT – Black; AEM High Capacity Universal Adjustable Fuel Pressure Regulator. Inlet: 2 X -6 (9/16-18) Outlet: -6 (9/16″-18), Gauge Port: 1/8″NPT, Vacuum Hose: 5mm (3/16″), and Universal Mounting […]