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 regulator adapts to virtually any vehicle. Adjustable from 20 psi to maximum fuel pump capacity. Supports fuel flow in racing applications up to 1,000 horsepower. Boost dependent rising fuel pressure rate (1:1). CNC-machined from 6061-T6 billet aluminum. Patent # 6,298,828. If you have any questions about this or any other items please contact Ostar Motorsports. We will be happy to help with all of your questions. Our team is composed of car enthusiasts with years of experience in automotive performance parts. Listing and template services provided by inkFrog.