AEM Universal Adjustable Fuel Pressure Regulator AEM's Universal Adjustable Fuel Pressure Regulator is capable of supporting enough fuel flow for engines up to 1000 horsepower. Our universal FPR is tapped to accept a -6 AN, or 9/16x18 fittings and includes a 1/8 NPT port for a fuel pressure gauge or pressure sensor pick up. -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