AEM's High Capacity Universal Adjustable Fuel Pressure Regulator is built 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 a wider adjustment range, an easy-to-adjust set screw stands up to repeated adjustments, and a single large return orifice is designed to handle high-flow-rate pumps.
WarrantyInstallation Instructions
Specifications:
- Black anodized 6061-T6 billet aluminum construction
- Inlet: 2 x -6 (9/16"-18); Outlet: -6 (9/16"-18); Gauge port: 1/8" NPT; Vacuum hose: 5mm (3/16")
- Adjustable from 40 to 130 PSI via a longer spring for a wider adjustment range
- Boost-dependent rising fuel pressure rate (1:1)
- Alcohol fuel and race fuel compatible
- Universal Mounting Bracket with four 10-32x1/2" screws included
- Barb fitting for outlet port sold separately (PN 25-390)
- Patent # 6,298,828
- Part Number: 25-305BK
FAQ
What pressure range does this regulator adjust to?
It adjusts from 40 to 130 PSI thanks to a longer spring for a wider adjustment range.
Is this regulator vehicle-specific?
No, it is a universal adjustable fuel pressure regulator that adapts to virtually any vehicle.
Is it compatible with race fuel or alcohol?
Yes, it is alcohol fuel and race fuel compatible.

