Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
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Unterminated 15' Flying Lead Main Harness

Type: Universal Unterminated Main Engine Harness

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Regular price $382.95
$479.95 Sale price $382.95 Regular price
-20%
Shipping calculated at checkout.

The unterminated main harness comes with both J1A and J1B connectors full terminated with 15' of flying lead wiring.

Features:

  • Unterminated
  • 15’ long flying lead harness
  • 60 Holley Crimped Wires (57x 20 ga, 3x 18 ga)
  • 30 optional plug seals

Specs:

  • Brand: Holley EFI
  • Category: Engine
  • Emission Code: 4
  • Grade Type: Performance
  • Harness Application: Universal
  • Harness Type: Main
  • Part Type: Engine Wiring Harness
  • Product Type: Universal Unterminated Main Engine Harness
  • Sub Category: Wire, Cable and Related Components

Tech Resources:

SKU:
558-126
Availability:
In stock
Vendor:
Category:

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Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.

Important Notices
  • Off‑Road Use Only
    Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply.
  • Check Local Laws
    Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area.
  • Professional Installation Recommended
    These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions.
  • Warranty Impact
    Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation.
  • Limitation of Liability
    JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products.
  • Product Images
    Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements.
  • No Performance Guarantees
    While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.


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Unterminated 15' Flying Lead Main Harness
Unterminated 15' Flying Lead Main Harness
Regular price $382.95
$479.95 Sale price $382.95 Regular price