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    Sale!

    Holley LSX Main Harness Connector Kit, OEM-Quality Pins/Seals/TPA | 570-103

    Vendor: Holley EFI
    Part Number: 570-103
    Save $21
    Sale Price $167.95 Regular Price $188.95

    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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    Holley's EFI Engine Connector Kits provide every engine connector used on Holley EFI main harnesses in one package, so builders assembling a custom engine harness don't have to hunt down individual connectors, pins, seals, and TPAs. The 570-103 kit covers LSX applications with genuine OEM-quality connectors.

    Specifications:

    • Application: LSX engine main harness
    • Connector Quality: OEM-quality
    • Terminal Type: Assorted male/female
    • Contents: Connectors, pins, seals, and TPAs
    • Pairs With: Holley flying lead harness, part number 558-126
    • Part Number: 570-103

    Intended for builders assembling a custom LSX engine harness; pairs with Holley's flying lead harness (558-126).

    FAQ

    What is included in the LSX Main Harness Connector Kit?

    It includes all the connectors, pins, seals, and TPAs used on Holley EFI LSX main harnesses.

    What is this kit used for?

    It's used to build a custom LSX engine harness from scratch, so you don't have to source individual connectors separately.

    Does this kit pair with another Holley product?

    Yes, it pairs well with Holley's flying lead harness, part number 558-126.

    Are these genuine OEM connectors?

    Yes, OEM-quality connectors are used throughout the kit.

    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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