AEM 25-303BK Adjustable Fuel Pressure Regulator for Honda and Acura

AEM's Honda/Acura Adjustable Fuel Pressure Regulators are capable of supporting enough fuel flow for engines up to 1000 horsepower. Our patented interchangeable discharge ports enable the regulator's output to match the output of any fuel pump.A single large discharge orifice is included.AEM includes a custom barb fitting to accommodate the factory fuel hose and the base of each regulator is tapped to accept a -6 AN or 9/16"x18 fittings. Fits Acura/Honda - B17A1/B18A1 - C30A1/C32 B1/A6 - D15B6/D16A 1/6 - G25A 1/4 - H22A1/H23A1 (must use AEM Fuel Rail)

• Patented interchangeable discharge orifices match output of virtually any fuel pump (single large port included)
• Mounts directly to O.E. fuel rail or AEM High Volume Fuel Rail
• Adjustable from 20 psi to maximum fuel pump capacity
• Boost dependent rising fuel pressure rate (1:1)
• No additional parts required for installation
• CNC-machined from 6061-T6 billet aluminum
• Accept a -6 AN or 9/16"x18 fittings
• Patent # 6,298,828

The AEM 25-303BK Adjustable Fuel Pressure Regulator is designed for Honda and Acura fuel systems requiring precise fuel pressure control and increased fuel delivery capability. Supporting engines producing up to 1,000 horsepower, this regulator helps maintain consistent fuel pressure under demanding street, track, and performance applications. Its boost-referenced rising-rate design increases fuel pressure at a 1:1 ratio as boost rises, helping support proper fuel delivery in forced-induction applications.

AEM's patented interchangeable discharge-port system allows the regulator output to be matched to virtually any fuel pump. A single large discharge orifice is included, while the regulator base accepts -6 AN or 9/16-inch by 18 fittings. A custom barb fitting is also included to accommodate the factory fuel hose. The regulator mounts directly to the original equipment fuel rail or an AEM High Volume Fuel Rail, with no additional installation parts required.

CNC-machined from durable 6061-T6 billet aluminum, the AEM 25-303BK provides adjustable fuel pressure from 20 psi up to the maximum capacity of the fuel pump. It is compatible with select Acura and Honda engines, including B17A1, B18A1, C30A1, C32B1, C32A6, D15B6, D16A1, G25A1, G25A4, H22A1, and H23A1 applications. H22A1 and H23A1 installations must use an AEM Fuel Rail. Listed fitment includes select 1995–2001 Honda Prelude models. This product is intended for racing and off-road use and is not emissions-certified for street use.

What's Included: AEM adjustable fuel pressure regulator, single large discharge orifice, and custom factory-fuel-hose barb fitting.

Features:

• High-Flow Performance: Supports fuel systems for engines producing up to 1,000 horsepower.
• Interchangeable Discharge Ports: Patented port design matches regulator output to virtually any fuel pump; one large discharge port is included.
• Adjustable Fuel Pressure: Adjusts from 20 psi to the maximum fuel pump capacity for precise system tuning.
• Boost-Referenced Operation: Provides a 1:1 rising fuel pressure rate for consistent fuel delivery under boost.
• Direct Installation: Mounts to the original equipment fuel rail or AEM High Volume Fuel Rail without additional installation parts.
• Durable Construction: CNC-machined from 6061-T6 billet aluminum for strength and long-term performance.
• Flexible Fitting Compatibility: Accepts -6 AN or 9/16-inch by 18 fittings and includes a custom factory-hose barb.
• Application-Specific Fitment: Fits select Acura and Honda engines and Honda Prelude models; H22A1 and H23A1 applications require an AEM Fuel Rail.

Fitments:
1986 Acura Integra LS
1986 Acura Integra RS
1987 Acura Integra LS
1987 Acura Integra LS Special Edition
1987 Acura Integra RS
1988 Acura Integra LS
1988 Acura Integra LS Special Edition
1988 Acura Integra RS
1988 Honda Civic RT 4WD
1988 Honda CRX HF
1988 Honda CRX Si
1989 Acura Integra LS
1989 Acura Integra RS
1989 Honda Civic RT 4WD
1989 Honda Civic Si
1989 Honda CRX HF
1989 Honda CRX Si
1990 Acura Integra GS
1990 Acura Integra LS
1990 Acura Integra RS
1990 Honda Civic EX
1990 Honda Civic RT 4WD
1990 Honda Civic Si
1990 Honda CRX HF
1990 Honda CRX Si
1991 Acura Integra GS
1991 Acura Integra LS
1991 Acura Integra RS
1991 Acura Legend L
1991 Acura Legend LS
1991 Acura NSX Base
1991 Honda Civic EX
1991 Honda Civic RT 4WD
1991 Honda Civic Si
1991 Honda CRX HF
1991 Honda CRX Si
1992 Acura Integra GS
1992 Acura Integra GS-R
1992 Acura Integra LS
1992 Acura Integra RS
1992 Acura Legend L
1992 Acura Legend LS
1992 Acura NSX Base
1992 Acura Vigor GS
1992 Acura Vigor LS
1992 Honda Prelude Si
1992 Honda Prelude Si 4WS
1993 Acura Integra GS
1993 Acura Integra GS-R
1993 Acura Integra LS
1993 Acura Integra RS
1993 Acura Legend L
1993 Acura Legend LS
1993 Acura NSX Base
1993 Acura Vigor GS
1993 Acura Vigor LS
1993 Honda Prelude Si
1993 Honda Prelude Si 4WS
1993 Honda Prelude VTEC
1994 Acura Legend L
1994 Acura Legend LS
1994 Acura NSX Base
1994 Acura Vigor GS
1994 Acura Vigor LS
1994 Honda Prelude Si
1994 Honda Prelude VTEC
1995 Acura Legend L
1995 Acura Legend LS
1995 Acura NSX Base
1995 Acura NSX T
1995 Acura TL Base
1995 Acura TL Premium
1995 Honda Prelude SE
1995 Honda Prelude Si
1995 Honda Prelude VTEC
1996 Acura NSX Base
1996 Acura NSX T
1996 Acura TL Base
1996 Acura TL Premium
1996 Honda Prelude Si
1996 Honda Prelude VTEC
1997 Acura NSX Base
1997 Acura NSX T
1997 Acura TL Base
1997 Acura TL Premium
1997 Honda Prelude Base
1997 Honda Prelude Type SH
1998 Acura NSX Base
1998 Acura NSX T
1998 Acura TL Base
1998 Acura TL Premium
1998 Honda Prelude Base
1998 Honda Prelude Type SH
1999 Acura NSX Alex Zanardi Edition
1999 Acura NSX Base
1999 Acura NSX T
1999 Honda Prelude Base
1999 Honda Prelude Type SH
2000 Acura NSX Base
2000 Acura NSX T
2000 Honda Insight Base
2000 Honda Prelude Base
2000 Honda Prelude Type SH
2001 Acura NSX Base
2001 Acura NSX T
2001 Honda Insight Base
2001 Honda Prelude Base
2001 Honda Prelude Type SH
2002 Acura NSX T
2002 Honda Insight Base

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