• 20-187bk_011984.jpg
  • 20-191bk_081984.jpg
  • 20-192bk_031984.jpg
  • 20-192bk_041984.jpg
  • 20-192bk_061984.jpg
  • 20-192bk_131984.jpg
  • 20-192bk_141984.jpg
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
  • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • 20-187bk_011984.jpg
    • 20-191bk_081984.jpg
    • 20-192bk_031984.jpg
    • 20-192bk_041984.jpg
    • 20-192bk_061984.jpg
    • 20-192bk_131984.jpg
    • 20-192bk_141984.jpg
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    • Mid-Mount Race Accessory System- Black Finish LS Engine Drive Includes Alternator, Tensioner, Crank Damper, Belt, & Pulleys Holley
    Sale!

    Holley LS Mid-Mount Race Accessory Drive System, Black, Alternator & Crank Damper | 20-187BK

    Vendor: Holley
    Part Number: 20-187BK
    Save $275
    $2,199.95 $2,474.95

    In 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.
    Payment & Security

    Secure, encrypted checkout. Card details go straight to the payment processor and are never stored by us.

    • Amazon
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Venmo
    • Visa
    Share to:
    View Full Details
    Product DetailsFAQReviewsRelated Products

    Built for racers who need a front-drive system without air conditioning or power steering, this Mid-Mount black-finish kit uses the same bracketless, C7 Corvette-derived water pump and 6-phase alternator technology as Holley's other Mid-Mount systems, with bottom heater outlets for tight-clearance swaps.

    Specifications:

    • Accessory Drive Style: Mid-Mount
    • Engine: GM Gen III/IV (LS)
    • Finish: Black
    • Material: Cast Aluminum
    • Inlet Size: 35.4mm / 1.4"
    • Alternator: 150 Amps (included)
    • A/C Compressor: Not Included
    • Power Steering: Not Included
    • Damper: Cast, included
    • Belt, Tensioner, Thermostat, Water Neck, Water Pump: Included
    • Pulley Style: Serpentine
    • Warning: California Proposition 65
    • Warranty: Manufacturer's Limited 90 Day Warranty
    • Part Number: 20-187BK

    Steam tube input port is 1/8" NPT. Fits all LS engines except those running dry sump and/or a supercharger; works with VVT applications and Hooker turbo manifolds.

    FAQ

    Does the 20-187BK kit include A/C or power steering?

    No — it's built as a race-oriented kit without A/C or power steering.

    What LS engines does it fit?

    All LS engines except those with a dry sump and/or supercharger; compatible with VVT applications and Hooker turbo manifolds.

    What size is the steam tube port?

    1/8" NPT.

    What alternator output does it use?

    A 150-amp premium alternator.

    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.

    Related Products

    Recently Viewed