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AEM 25-303BK Adjustable Fuel Pressure Regulator

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AEM 25-303BK Adjustable Fuel Pressure Regulator
AEM Electronics

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#18625303BK

AEM 25-303BK Adjustable Fuel Pressure Regulator

$206.95

/each

Factory Shipped

$230.95

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Product Summary

Universal Fit, 20-60 Fuel Pressure Rating (psi)

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    Key Specs

    MFG. Part #25-303BK
    BrandAEM Electronics
    Regulator StyleReturn
    Material TypeAluminum
    See more specs

    Need To Know

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    AEM Electronics 25-303BK Details

    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, additional ports are sold separately). 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.

    Features

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

    Application

    PART # MAKE YEAR MODEL ENGINE NOTES
    25-303BK Acura 1990-1993 Integra GS 1.8L/1834ccL4 [B18A1]  
    25-303BK Acura 1992-1993 Integra GS-R 1.7L/1678ccL4 [B17A1]  
    25-303BK Acura 1986-1989 Integra LS 1.6L/1590ccL4 [D16A1]  
    25-303BK Acura 1990-1993 Integra LS 1.8L/1834ccL4 [B18A1]  
    25-303BK Acura 1987-1988 Integra LS Special Edition 1.6L/1590ccL4 [D16A1]  
    25-303BK Acura 1986-1989 Integra RS 1.6L/1590ccL4 [D16A1]  
    25-303BK Acura 1990-1993 Integra RS 1.8L/1834ccL4 [B18A1]  
    25-303BK Acura 1991-2001 NSX 3.0L/2977ccV6 [C30A1]  
    25-303BK Acura 1997-1998 NSX 3.2L/3179ccV6 [C32B1]  
    25-303BK Acura 1999-2001 NSX 3.2L/3179ccV6 [C32B1]  
    25-303BK Acura 1999 NSX Alex Zanardi Edition 3.2L/3179ccV6 [C32B1]  
    25-303BK Acura 1995-2002 NSX T 3.0L/2977ccV6 [C30A1]  
    25-303BK Acura 1997 NSX T 3.2L/3179ccV6 [C32B1]  
    25-303BK Acura 1998-2002 NSX T 3.2L/3179ccV6 [C32B1]  
    25-303BK Acura 1995-1998 TL 2.5L/2451ccL5 [G25A4]  
    25-303BK Acura 1996-1998 TL 3.2L/3206ccV6 [C32A6]  
    25-303BK Acura 1995-1998 TL Premium 2.5L/2451ccL5 [G25A4]  
    25-303BK Acura 1996-1998 TL Premium 3.2L/3206ccV6 [C32A6]  
    25-303BK Acura 1992-1994 Vigor GS 2.5L/2451ccL5 [G25A1]  
    25-303BK Acura 1992-1994 Vigor LS 2.5L/2451ccL5 [G25A1]  
    25-303BK Honda 1990-1991 Civic EX 1.6L/1590ccL4 [D16A6]  
    25-303BK Honda 1988-1991 Civic RT 4WD 1.6L/1590ccL4 [D16A6]  
    25-303BK Honda 1989-1991 Civic Si 1.6L/1590ccL4 [D16A6]  
    25-303BK Honda 1988-1989 CRX HF 1.5L/1493ccL4  
    25-303BK Honda 1990-1991 CRX HF 1.5L/1493ccL4 [D15B6]  
    25-303BK Honda 1988-1991 CRX Si 1.6L/1590ccL4 [D16A6]  
    25-303BK Honda 2000-2002 Insight 1.0L/995cc (61ci) L3 ELEC/GAS [ECA1]  
    25-303BK Honda 1997-2001 Prelude 2.2L/2156ccL4 [H22A4] Must use AEM Fuel Rail
    25-303BK Honda 1995 Prelude SE 2.3L/2259ccL4 [H23A1] Must use AEM Fuel Rail
    25-303BK Honda 1992-1996 Prelude Si 2.3L/2259ccL4 [H23A1] Must use AEM Fuel Rail
    25-303BK Honda 1992 Prelude Si 4WS 2.3L/2259ccL4 [H23A1] Must use AEM Fuel Rail
    25-303BK Honda 1993 Prelude Si 4WS 2.3L/2259ccL4 Must use AEM Fuel Rail
    25-303BK Honda 1997-2001 Prelude Type SH 2.2L/2156ccL4 [H22A4] Must use AEM Fuel Rail
    25-303BK Honda 1993-1996 Prelude VTEC 2.2L/2156ccL4 [H22A1] Must use AEM Fuel Rail

    Rebates

    Holley October Promo 10% Off Select Parts Sale

    Holley October Promo 10% Off Select Parts SaleHolleyOctoberPromo10%OffSelectPartsSale

    Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.

    CARB Warning

    For race/ off road use only

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.
    CA Prop 65
    CARB warning

    AEM Electronics 25-303BK Specifications

    KEY SPECS
    MFG. Part #25-303BK
    BrandAEM Electronics
    Regulator StyleReturn
    Material TypeAluminum
    GENERAL
    Fuel Pressure Rating (psi)20-60
    Inlet Quantity1
    Outlet Quantity1
    Regulator MaterialAluminum
    Boost/Vacuum Reference PortYes
    Gauge PortNo
    RebuildableYes
    Includes Mounting Bracket(s)No
    Fittings IncludedNo
    Return AttachmentStock
    Sold in QuantityEach
    Regulator LocationFuel rail mount
    GTIN Code840879020040

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