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    • Big Block Chevy Mid-Mount Complete Accessory System Big Block Chevy Mid-Mount Complete Accessory System- Black Finish Holley
    • Big Block Chevy Mid-Mount Complete Accessory System Big Block Chevy Mid-Mount Complete Accessory System- Black Finish Holley
    • Big Block Chevy Mid-Mount Complete Accessory System Big Block Chevy Mid-Mount Complete Accessory System- Black Finish Holley
    • Big Block Chevy Mid-Mount Complete Accessory System Big Block Chevy Mid-Mount Complete Accessory System- Black Finish Holley
    • Big Block Chevy Mid-Mount Complete Accessory System Big Block Chevy Mid-Mount Complete Accessory System- Black Finish Holley
    • Big Block Chevy Mid-Mount Complete Accessory System Big Block Chevy Mid-Mount Complete Accessory System- Black Finish Holley
    • Big Block Chevy Mid-Mount Complete Accessory System Big Block Chevy Mid-Mount Complete Accessory System- Black Finish Holley

    Holley Big Block Chevy Mid-Mount Complete Accessory System, 150 Amp Alternator, Black Finish | 20-242BK

    Vendor: Holley
    Part Number: 20-242BK
    Save $275
    Sale Price $2,199.95 Regular Price $2,474.95

    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.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    Holley's Mid-Mount accessory drive eliminates the traditional accessory bracket setup entirely. The "bracketless" design bolts accessories directly to the water pump for a clean, integrated look and superior engine bay visibility. The system includes a premium 150-amp alternator with 6-phase technology and a water pump, both sharing design efficiencies with the C7 Corvette.

    Specifications:

    • Accessory Drive Style: Mid-Mount
    • Application: Chevrolet Big Block V8
    • A/C Compressor: SD7, included
    • Alternator: 150 Amp, included
    • Finish: Black
    • Material: Cast Aluminum
    • Belt, Tensioner, Water Pump, Water Pump Pulley, Water Neck: Included
    • Power Steering Pump, Reservoir, Hardline, Pulley: Included
    • Product Type: Accessory Drive Kits
    • Part Number: 20-242BK

    Every accessory, pulley, and the belt are included, along with A/C line adapter, heater hose adapters, power steering hardline to -6AN adapter, and the alternator plug/harness. The power steering pump can also be used with Hydroboost brake systems; refer to the flow specs on part number 198-101.

    FAQ

    What's included in this kit?

    Everything needed for a complete swap: water pump, SD7 A/C compressor, 150-amp alternator, power steering pump with baffled reservoir, all pulleys, belt, A/C line adapter, heater hose adapters, power steering hardline to -6AN adapter, and alternator plug/harness.

    Does this use a bracket-based mounting design?

    No, it uses a "bracketless" design where accessories bolt directly to the water pump for a clean, integrated form.

    Can the power steering pump work with a Hydroboost brake system?

    Yes, refer to the flow specs on Holley part number 198-101.

    What finish options are available?

    Natural and black finishes.

    What engines does this fit?

    Chevrolet big block V8 engines.

    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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