• Holley 558-104 HP / Dominator EFI MPFI Main Wiring Harness
  • Holley 558-104 HP / Dominator EFI MPFI Main Wiring Harness

Holley 558-104 HP / Dominator EFI MPFI Main Wiring Harness

$571.95 USD
$571.95 USD
$571.95 USD
Shipping calculated at checkout.

Vendor : HOLLEY

Product Type : Ignitions and Electrical

Sku : HLY558-104

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3
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Main Harness - Universal MPFI

The Holley 558-104 EFI Wiring Harness is a universal MPFI main harness designed for use with Holley HP and Dominator EFI systems. It provides the main wiring connection for an MPFI EFI configuration and is supplied as an individual harness.

This harness is identified as the Holley Universal MPFI Main Harness, making it a suitable component for applicable installations using Holley HP or Dominator EFI equipment. Review the requirements of your EFI system and vehicle application before installation to confirm suitability.

With its dedicated part number and universal designation, the 558-104 offers a direct way to identify the required main harness for supported Holley MPFI EFI setups. Professional installation and careful routing of wiring are recommended to support a clean, reliable installation.

Features:

  • Brand: Holley
  • Part Number: 558-104
  • Harness Type: MPFI main wiring harness
  • EFI System Compatibility: Holley HP and Dominator EFI systems
  • Application: Universal
  • Quantity: Each