The AEM Adjustable Fuel Pressure Regulator 25-303BK is a precision-engineered solution for high-performance Honda and Acura engines, capable of supporting fuel systems up to 1000 horsepower. Designed for tuners and racers seeking fine fuel pressure control, this regulator features interchangeable discharge ports that allow you to tailor fuel output precisely to your pump’s flow rate. A large discharge orifice is included to support high-volume fuel delivery, making it ideal for turbocharged, supercharged, or naturally aspirated performance builds.
Constructed from durable materials and finished in black anodized aluminum, the 25-303BK offers both strength and corrosion resistance. Its base is tapped to accept -6 AN or 9/16"x18 fittings for flexible installation options, while a custom barb fitting simplifies connection to factory fuel hoses. Engineered to maintain consistent fuel pressure under demanding conditions, this regulator provides the accuracy and reliability required for professional tuning environments.
Compatible with multiple Honda and Acura applications from 1986 to 2002, the AEM 25-303BK ensures consistent fuel flow and stable pressure across varying engine loads. Whether you’re upgrading a stock setup or building a high-output race engine, this regulator delivers precise control, proven reliability, and the flexibility needed for modern fuel system tuning.
Features:
- Supports up to 1000 horsepower for demanding performance applications
- Interchangeable discharge ports for customized fuel output
- Includes a large discharge orifice for optimal fuel flow
- Custom barb fitting for factory fuel hose compatibility
- Base tapped to accept -6 AN or 9/16"x18 fittings
- Compatible with Honda/Acura models from 1995 to 2001
- Durable construction for reliable operation
- Adjustable pressure to fine-tune fuel delivery
- Built to meet high-performance standards
- Prop 65 compliant for safety
Fitment:
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
