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Holley 300-255BK

Holley Split-Design Race Intake Manifold


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Holley Split-Design Race Intake Manifold $549.95
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Split-Design Race Intake Manifold
  • Fits GM Gen III, IV LS Engines with LS1, LS2, LS6 Cathedral Port Cylinder Heads
  • EFI Applications
  • Single Plane
  • 4150 Square Bore Flange
  • Cast Aluminum
  • Black Finish
  • For Off-Road Use Only
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    Holley 300-255BK Details

    GM LS


    • Performance-oriented intake with hood clearance consideration in mind 
    • Split design allows for easy disassembly
    • Suitable for carburetor or throttle body mounted EFI system
    • O-Ring seals at head ports and between split sections
    • Lightweight cast aluminum construction
    • For off-road use only

    Holley Split-Design Race Intake Manifold Technical Specs

    7.320 in. Maximum Height

    0 Degree Carb Flange Angle

    3.280 in. H x 1.100 in. W Cathedral Port Size

    (2) 1/8 in. NPT Vacuum Ports

    (1) 1/4 in. NPT Vacuum Port

    (1) 3/8 in. NPT Vacuum Port 


    Manufacturer's Part Number:
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    Intakes Designed with Racing in Mind

    Holley Split-Design Race Intake Manifolds incorporate a unique feature typically reserved for high-end, custom racing intakes. These manifolds have a split design that allows the intake to be disassembled into two halves for direct access to the internal ports and plenum. The modular plane design of these intakes can accept either a carburetor or throttle body-mounted electronic fuel injection system. All Holley Split-Design Race Intake Manifolds come complete with mounting hardware, O-ring seals and shoulder bolts that hold both halves together.

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.