AEM Adjustable Fuel Pressure Regulator – Universal – Black [25-302BK]. Universal Adjustable Fuel Pressure Regulator, Black Anodized, Inlet 2 X -6 (9/16-18), Outlet -6 (9/16-18), Gauge Port 1/8-inch NPT. OVERVIEW AEM’s Universal Adjustable Fuel Pressure Regulator (AEM 25 302BK) is capable of supporting enough fuel flow for engines up to 1000 horsepower. Universal fuel pressure […]