AEM 25-305BK High Capacity Universal Adjustable Fuel Pressure Regulator, Black

AEM High Capacity Universal Adjustable Fuel Pressure Regulator. Black Anodized. Inlet: 2 X -6 (9/16-18) Outlet: -6 (9/16"-18), Gauge Port: 1/8"NPT, Vacuum Hose: 5mm (3/16"), and Universal Mounting Bracket with Four (4) 10-32x1/2" Screws. Barb fitting for Outlet port sold separately PN 25-390.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. Inlet: 2 x -6AN (9/16-18) Outlet: -6AN - Gauge Port: 1/8 in. NPT - Black

• Three -6AN (9/16"-18) ORB O-ring style inlet ports (2 inlet, 1 return)
• Universal fuel pressure regulator adapts to virtually any vehicle
• Longer spring for wider range of adjustment (40 - 130 PSI)
• Boost dependent rising fuel pressure rate (1:1)
• CNC-machined from 6061-T6 billet aluminum
• Alcohol fuel and race gas compatible
• Integrated 1/8" NPT gauge port
• Patent # 6,298,828

The AEM 25-305BK High Capacity Universal Adjustable Fuel Pressure Regulator is designed for high-boost vehicles, racecars, and fuel systems requiring reliable pressure control and high-volume fuel flow. Its universal design adapts to a wide range of automotive applications, while the black anodized finish provides durable corrosion resistance and a professional appearance.

A longer internal spring allows fuel pressure adjustment from 40 to 130 PSI, and the accessible adjustment screw is designed to withstand repeated tuning changes. The regulator uses a 1:1 rising-rate pressure curve for boost-referenced applications, helping maintain consistent fuel delivery as manifold pressure increases. A large return orifice supports high-flow fuel pumps, while compatibility with alcohol fuels and race gas makes the AEM 25-305BK suitable for demanding competition and performance applications.

The regulator features two -6AN inlet ports and one -6AN return port using 9/16-18 O-ring boss connections. An integrated 1/8-inch NPT gauge port accepts a fuel pressure gauge or pressure sensor pickup. The CNC-machined 6061-T6 billet aluminum body includes a universal mounting bracket and hardware for installation. A separate outlet barb fitting is required if a hose-barb connection is preferred. This product is intended for racing and off-road performance use and is not CARB approved.

What's Included: AEM 25-305BK adjustable fuel pressure regulator, universal mounting bracket, and four 10-32 x 1/2-inch mounting screws.

Features:

• High-capacity fuel pressure control: Supports high-volume fuel systems and high-flow fuel pumps used in boosted vehicles and racecars.
• Wide adjustment range: Long internal spring provides adjustable fuel pressure from 40 to 130 PSI.
• Boost-referenced performance: Provides a 1:1 rising fuel pressure rate to help maintain fuel system pressure under boost.
• Durable universal construction: CNC-machined 6061-T6 billet aluminum body with black anodized finish, alcohol fuel and race gas compatibility, three -6AN O-ring boss ports, integrated 1/8-inch NPT gauge port, and included mounting hardware.

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1