300-137 Single Plane Mid-Rise EFI Intake Manifold GM LS1/LS2/LS6 Cathedral Port
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HOLLEYPART NUMBER: 510-300-137

300-137 Single Plane Mid-Rise EFI Intake Manifold GM LS1/LS2/LS6 Cathedral Port

$51095
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EFI Intakes
  • GM LS1 / LS2 / LS6 Cathedral Port
  • Single Plane Mid-Rise EFI Intake Manifold
  • GM LS1/LS2/LS6 Cathedral Port
  • Machined Injector Bosses
  • Square Bore Throttle Body Flange
  • 2500-7000 RPM
  • Natural Finish

    Features:

    • Designed for performance-minded LS engines with a 2,500-7,000 rpm power band
    • Cast aluminum construction with consistent wall thickness throughout and strong mounting flanges
    • Constant cross-sectional area produces a broad torque curve
    • Accepts a throttle body with a Holley 4150 square bore flange
    • The lowest carb flange height possible for improved hood clearance
    • Ideal manifold for the centrifugal blower, turbocharger or nitrous power adders
    • Matching black anodized billet fuel rails available separately

     

    Intake Manifold Includes:

    • Zinc plated hex head cap mounting bolts & washers
    • 3/8" NPT hex socket pipe plug (to block the manifold vacuum port if necessary)
    • 1/8" NPT hex socket pipe plug (to block the MAP sensor port if necessary)
    • (8) Viton O-ring cylinder head mounting flange gaskets Intake Manifold Specs: Intake Manifold Specs:
    • RPM Range: 2,500 - 7,000
    • Weight: 11.5 lbs
    • Port Size: 2.66"H x 0.92"W
    • Carb Mounting Flange Height from Lifter Valley Cover Flange: 4.95"
    • Carb Flange: Standard Holley 4150, accepts up to 1.75" diameter throttle bores
    • Vacuum Port Thread: 3/8" NPT
    • MAP Sensor Port Thread: 1/8" NPT
    • Single Plane Aluminum Intakes for Maximum Performance

      Holley LS Single Plane Intake Manifolds for carbureted and EFI applications are ideal for higher horsepower engines as well as those incorporating forced induction or nitrous oxide power adders. Thanks to Holley's advanced casting technology, these lightweight aluminum intakes only weigh 11.5 lbs. and the runner design features a constant cross-sectional area that is ideal for a broad powerband from 2,500-7,000 RPM. With a consistent wall thickness throughout for balanced performance and sealing strength, this excellent design has the lowest carb mounting flange height possible without sacrificing power.

      Show More

      Unlock maximum performance from your LS engine with the Holley LS Single Plane Intake Manifolds for Carb & EFI—engineered to deliver exceptional high-RPM airflow and horsepower gains for serious street and race applications. Whether you're running a carbureted setup or modern EFI, this manifold offers the versatility and performance Holley is known for.

      Designed for LS cathedral port heads, this LS Holley intake manifold is ideal for builders who want a clean, high-performance solution without sacrificing compatibility. It features a single-plane, high-rise design that enhances mid-to-high RPM power, making it perfect for track cars, drag racers, or any LS-powered build pushing for peak output.

      This carburetor intake for LS motor includes provisions for fuel injectors and sensors, giving you the freedom to run a carb setup now and easily upgrade to EFI later—or vice versa. It's an excellent choice for anyone seeking a modular intake that evolves with their build.

      The LS cathedral port carb intake is precision-machined from high-quality aluminum and finished with a sleek look that complements any engine bay. Holley's renowned engineering ensures reliable fitment, optimized runner geometry, and excellent throttle response under hard acceleration.

      Whether you're upgrading a street machine or assembling a competition-ready engine, Holley's LS Single Plane Intake Manifold delivers airflow, flexibility, and bolt-on power you can feel. Backed by decades of performance innovation, this manifold is a must-have for serious LS enthusiasts.

    Part TypeIntake Manifold
    Product LineHolley LS Single Plane Intake Manifolds Carb & EFI
    BrandHOLLEY
    Package Height7.3
    Package Width14.6
    Package Length23.0
    Weight14.7 PG
    Part CategoryPerformance Parts
    UsageStreet/Hi-Performance
    Number Of CarbsNone, For Fuel Injection
    PositionUpper
    EmissionWithout EGR
    Rpm Range2500-7000
    Cylinder Head TypeStandard
    Part FitmentSemi Universal
    Engine Make/SizeGM LS
    Vendor Part Number300-137
    Package Qty1
    Package TypeEA
    No Questions
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