Product Summary

LS7, Carbureted Fuel System Type, Aluminum, Natural

    Key Specs

    MFG. Part #300-228
    Intake Manifold TypeTunnel Ram
    Material TypeAluminum

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    Holley 300-228 Details

    The Holley GM LS7 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS7 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more! The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and to be attractive to builders and fabricators as the foundation for custom induction systems. Runner length and the tapered cross-section designed to perform well for a wide range of engine configurations EFI fuel rails are machined for -8AN O-ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits. Cast aluminum construction. Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 7000-8000+RPM.

    • Port Size - 2.49 Height x 1.21 Wide
    • Mounting Flange Gasket Type - Standard LS3 Molded O-Ring
    • Plenum Top Gasket Type - 3/32 Round O-ring Cord
    • Runner Length - 6.29 , As-Cast Runner Cross-Sectional Area - Tapered 4.67 in² to 2.84 in²
    • Use with Carbureted Upper Manifolds

    Installation Instructions (PDF)

    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.

    Holley 300-228 Specifications

    MFG. Part #300-228
    Intake Manifold TypeTunnel Ram
    Material TypeAluminum
    Fuel System TypeCarbureted
    Intake Section IncludedBase Only
    Fuel Rails IncludedYes
    GTIN Code090127681732