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    Sale!

    Holley EFI Hi-Ram Fabricated Side Mount Plenum Top, 95mm, Silver | 300-284

    Vendor: Holley EFI
    Part Number: 300-284
    Save $60
    Sale Price $478.95 Regular Price $538.95

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    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.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    This fabricated aluminum plenum top mounts to Holley's existing Hi-Ram manifold bases and moves the throttle body to the side of the intake — a layout that resembles older Ford EFI manifolds and frees up room in tight engine bays for boosted or custom builds.

    Specifications:

    • Construction: Fabricated, 4mm-thick aluminum
    • Finish: Silver
    • Inlet Size: 95mm
    • Throttle Body Pattern: LS-style
    • Mounts To: Existing Holley Hi-Ram manifold bases
    • Warranty: Manufacturer's Limited 90 Day Warranty
    • Part Number: 300-284

    Also offered in 105mm sizing and in an 86-95 Ford 5.0-style throttle body pattern; see the product images for full dimensions.

    FAQ

    What manifold does this plenum top fit?

    It mounts directly to Holley's existing Hi-Ram manifold bases.

    Why choose a side-mount plenum top?

    Side-mounting the throttle body frees up room in tight engine bays, making it easier to fabricate boosted setups or achieve a different look.

    What throttle body pattern does this version use?

    This 95mm version uses an LS-style throttle body pattern; a Ford 5.0-style pattern is also available.

    What material is this plenum top made from?

    It's fabricated from 4mm-thick aluminum with a silver finish.

    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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