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  • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
  • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
  • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
  • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
  • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
  • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
    • 2eb8e77b916f2e1f3d31abae2d094d320bd3c5d0.jpg
    • 72386d305314549f8e37248948fbaef348dcd7ca.jpg
    • aa74c0ea7d989806aaf57f1b925d449c6a2656ce.jpg
    • dfa9ca7a4d6e6c51441f6dd1884dbe7a7631c823.jpg
    • fafe77bd0c9543084672227adecbde755d5ecddd.jpg
    • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
    • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
    • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
    • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
    • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
    • LS Accessory Drive Bracket Installation Kit for Long Alignment Installation Kit, LS Acc Drive Brackets, Use with Long Belt Alignment (alignment Common on Trucks & '10-UP Camaro) Holley
    Sale!

    Holley LS Accessory Drive Installation Kit, Long Belt Alignment, High-Mount | 21-3

    Vendor: Holley
    Part Number: 21-3
    Save $117
    $94.95 $211.95

    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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    Product DetailsFAQReviewsRelated Products

    This installation kit sets the proper spacing for Holley A/C, alternator, and power steering accessory drive brackets so belts ride at the correct distance on an LS engine using long belt alignment (the alignment common on trucks and 2010-and-up Camaros). An application-specific installation kit like this one is required for most LS accessory drive setups.

    Specifications:

    • Accessory Drive Style: High-Mount
    • Belt Alignment: Long
    • Engine Fitment: GM Gen III/IV (LS)
    • Material: Aluminum
    • Finish: Cast
    • Thickness: 1.589" driver side / 2.119" passenger side
    • Part Number: 21-3

    Includes hardware for installation; aluminum construction resists rust and is lighter than steel brackets.

    FAQ

    What is the 21-3 installation kit used for?

    It provides the correct spacing for Holley A/C, alternator, and power steering accessory drive brackets on LS engines with long belt alignment.

    What belt alignment does it match?

    Long belt alignment, common on trucks and 2010-and-up Camaros.

    What material is the kit made from?

    Cast aluminum, which resists rust and is lighter than steel.

    Is this kit required for accessory bracket installation?

    Yes, an application-specific installation kit like the 21-3 is required for most Holley LS accessory drive bracket setups.

    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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