Product Summary

305, 327, 350, 400, Carbureted Fuel System Type

    Key Specs

    MFG. Part #2504

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    These Performer RPM Marine Intake Manifolds feature a low-rise, dual plane design with patented runner tuning and a 180 degree firing order. With boosts in torque over a wide RPM range from idle to 5,500 RPM, these intakes also increase throttle response and feature brass lined front water crossovers and flange inserts to cover the rear water openings in the cylinder heads for added protection against salt water corrosion. Designed specifically for Marine applications.
    • Cast Aluminum
    • Broad Powerband
    • Performer RPM
    • Dual Plane, aluminum, natural
    • For 1955-86 Small Block Chevy engines
    • Marine applications


    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    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, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. 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.


    MFG. Part #2504
    Fuel System TypeCarbureted
    Intake Manifold TypeDual Plane
    Carburetor QuantityOne
    Carburetor Flange Type4-Barrel Square Bore
    RPM Range1,500-6,500
    Material TypeAluminum
    Intake Section IncludedComplete
    Gaskets IncludedNo
    Overall Height4.72"
    Bolt Hole Pattern5.160" x 5.625"
    Sold in QuantityEach
    NotesDesigned for Marine use only. Features brass lined front water crossovers and brass flange inserts to cover the rear water openings.
    GTIN Code085347025046