Product Summary

Aluminum, Black anodized

    Key Specs

    Material TypeAluminum
    FinishBlack anodized
    Inlet Size-6 AN O-ring
    Fittings IncludedYes
    Hardware IncludedYes

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    AEM Electronics 25-103BK Details

    AEM High Volume fuel rails feature a 1/2-inch fuel bore to support fuel flow for applications up to 1,000 horsepower. This large bore also dampens backpressure pulses created by larger injectors and works perfectly with stock injector sizes. An additional 1/8th NPT port is included to accommodate a nitrous set up or fuel pressure gauge. A custom fuel line fitting is included for the factory fuel line, and in most cases the ends of each rail are pre tapped to accept -6 AN or 9/16”x18 fittings for users who want to use custom fuel lines.


    • Supports fuel flow up to 1,000 horsepower
    • No additional parts required for installation - installs with factory fuel line using supplied fitting
    • Pre-tapped for -6 AN or 9/16"x 18 fittings
    • Specifically engineered for each application
    • Works with factory fuel line or custom fuel lines
    • 1/2 inch bore dampens backpressure pulses from larger fuel injectors
    • 1/8 NPT port included for nitrous pick up or fuel pressure gauge
    • Comprehensive installation instructions, hardware, fittings, and injector O-rings included
    • CNC Machined from billet aluminum
    • Black anodizing with laser engraving
    • Complete hardware, fittings and injector O-rings included
    • Manufactured and assembled in the USA


    Make Year Model Engine
    Honda 1994-1995 Civic del Sol VTEC 1.6L/1590ccL4 [B16A3]
    Honda 1996-1997 Civic del Sol VTEC 1.6L/1590ccL4 [B16A2]
    Honda 1999-2000 Civic Si 1.6L/1595ccL4 [B16A2]

    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.

    AEM Electronics 25-103BK Specifications

    MFG. Part #25-103BK
    BrandAEM Electronics
    Material TypeAluminum
    FinishBlack anodized
    Inlet Size-6 AN O-ring
    Fittings IncludedYes
    Hardware IncludedYes
    Sold in QuantityEach
    GTIN Code840879019822