AEM – High Capacity – Adjustable Fuel Pressure Regulator (Adjustable from 40-130 PSI) UNIVERSAL


SKU: 25-305BK Categories: ,



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AEM’s High Cap Universal Adjustable Fuel Pressure Regulator (PN 25-305BK) is the perfect solution for racers who need reliable fuel pressure in high-boost vehicles and racecars that require a large volume of fuel delivery. A longer spring provides for a wider range of adjustment (from 40 to 130 PSI). An easy-to-adjust set screw stands up to repeated adjustments.

A single large return orifice is designed to handle high rate flow pumps. The regulator has a 1:1 rising pressure rate for boosted applications, and it is alcohol fuel and race fuel compatible. The High Cap Universal FPR is tapped to accept a 9/16”-18 O-Ring sealed fittings for inlet and return, 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
– Longer spring for wider range of adjustment (40 – 130 PSI)
– Single large return orifice accommodates very high flow rate pumps
– Boost dependent rising fuel pressure rate (1:1)
– Three 9/16″-18 ORB O-ring style inlet ports (2 inlet, 1 return)
– Easy to use adjustment screw
– Integrated 1/8″ NPT gauge port
– 5mm (3/16″) vacuum hose
– Alcohol fuel and race gas compatible
– CNC-machined from 6061-T6 billet aluminum
– Patent # 6,298,828