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    Holley EFI Intake Manifold, Chevy Big Block V8, Oval Port 4150 | 300-561

    Vendor: Holley EFI
    Part Number: 300-561
    Save $88
    Sale Price $699.95 Regular Price $787.95

    Currently out of stock.

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
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    This multi-point fuel injection intake manifold converts a big block Chevy from carburetion to EFI, computer-designed and dyno-proven for more horsepower and torque than other EFI manifolds. It's built for oval port heads with a 4150-style throttle body flange.

    Specifications:

    • Engine: Chevy Big Block V8 (396, 402, 427, 454, 502)
    • Basic Operating RPM Range: 3,000-7,500
    • Flange Style: 4150 Square Bore
    • Cylinder Head Port Shape: Oval
    • Port Dimensions: 1.87" H x 1.60" W
    • Deck Height: 9.8"
    • Finish: Natural
    • Construction: Cast Aluminum
    • Vacuum Ports: Yes
    • Height: Front 5.96", Rear 5.96"
    • EGR Provisions: None
    • Includes: Anodized, laser-etched fuel rails and two sets of mounting brackets (1.48" or 2.56" O-ring to O-ring injector lengths)
    • Part Number: 300-561

    FAQ

    What heads does the 300-561 fit?

    Oval port big block Chevy cylinder heads, with a 4150-style throttle body flange.

    What comes in the box?

    Anodized, laser-etched fuel rails and two sets of mounting brackets for 1.48" or 2.56" O-ring to O-ring injector lengths.

    Does it have EGR provisions?

    No, this manifold has no EGR provisions.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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