The AEM Adjustable Fuel Pressure Regulator 25-301BK is engineered to support high-flow fuel systems—capable of handling fuel flow requirements for engines up to 1,000 hp. Constructed from CNC-machined 6061-T6 aluminum, it offers both precision and durability. The regulator features interchangeable discharge orifices to match output volume of various fuel pumps, enabling accurate fuel pressure regulation and stable control across a wide range of applications. With a 1:1 rising fuel pressure rate under boost, this regulator maintains proper fuel system behavior during heavy loads and high boost environments. Base ports are tapped for -6 AN or 9/16″–18 fittings, and the unit mounts directly to OE fuel rails or compatible high-volume rails. Designed primarily for Honda and Acura platforms (but usable in other custom setups) it’s a robust choice for tuners seeking reliable fuel pressure control in performance or racing use.
Features:
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Adjustable fuel pressure from approximately 20 psi up to fuel-pump capacity
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1:1 rising fuel pressure rate to match boost and maintain proper fuel delivery
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Interchangeable discharge orifices to tailor return flow to any fuel pump setup
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CNC-machined billet aluminum body for durability and precision
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Tapped base to accept -6 AN or 9/16″-18 fittings for flexible installation
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Mounts directly to OE fuel rail or compatible high-volume fuel rail
Fitment:
1996 Honda Civic CX
1996 Honda Civic DX
1996 Honda Civic HX
1996 Honda Civic LX
1996 Honda Civic del Sol S
1997 Honda Civic CX
1997 Honda Civic DX
1997 Honda Civic HX
1997 Honda Civic LX
1997 Honda Civic del Sol S
1998 Acura CL Base
1998 Acura CL Premium
1998 Honda Accord DX
1998 Honda Accord EX
1998 Honda Accord LX
1998 Honda Civic CX
1998 Honda Civic DX
1998 Honda Civic HX
1998 Honda Civic LX
1999 Acura CL Premium
1999 Honda Accord DX
1999 Honda Accord EX
1999 Honda Accord LX
1999 Honda Civic CX
1999 Honda Civic DX
1999 Honda Civic HX
1999 Honda Civic LX
1999 Honda Civic Value Package
1999 Honda CR-V EX
1999 Honda CR-V LX
2000 Honda Accord DX
2000 Honda Accord EX
2000 Honda Accord LX
2000 Honda Accord SE
2000 Honda Civic CX
2000 Honda Civic DX
2000 Honda Civic HX
2000 Honda Civic LX
2000 Honda CR-V EX
2000 Honda CR-V LX
2000 Honda CR-V SE
2000 Honda S2000 Base
2001 Honda Accord DX
2001 Honda Accord EX
2001 Honda Accord LX
2001 Honda Accord Value Package
2001 Honda S2000 Base
2002 Honda Accord DX
2002 Honda Accord EX
2002 Honda Accord LX
2002 Honda Accord SE
2002 Honda Accord Value Package
2002 Honda S2000 Base
2003 Honda S2000 Base
2004 Honda S2000 Base
2005 Honda S2000 Base
