Main Power Harness
Main Power Harness
Main Power Harness
Main Power Harness
Main Power Harness
Main Power Harness
Main Power Harness
Main Power Harness
Main Power Harness
Main Power Harness
Sale

Main Power Harness

Type: Power Harness

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Regular price $94.45
$118.95 Sale price $94.45 Regular price
-21%
Shipping calculated at checkout.

This Harness is required with HP or Dominator ECUs. Includes, 13' long, 10 AWG main power harness, Qty. (2) 3/8" ring terminals and shrink tube (not pictured) . The harness is fuse protected and covered in braided split loom for additional abrasion protection .

Specs:

  • Brand: Holley EFI
  • Category: Ignition
  • Emission Code: 3
  • Fuse: 40 AMP max
  • Harness Application: Universal
  • Harness Type: Main Battery Power
  • Part Type: Ignition Harness
  • Product Type: Power Harness
  • Sub Category: Ignition Wire and Related Components
  • Wire Diameter: 10 awg
  • Wire Length: 13 Feet
  • Wire Series: Automotive TXL

Tech Resources:

The Main Power Harness MUST be connected directly to the Battery terminals. Do not connect them to any other location such as a disconnect switch, starter solenoid or distribution lug. The harness length is 13 feet. If you need to extend the length do so with 8 AWG or larger multi-strand wire.

EFI selection chart

SKU:
558-308
Availability:
In stock
Vendor:
Category:
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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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Main Power Harness
Main Power Harness
Regular price $94.45
$118.95 Sale price $94.45 Regular price