Holley 558-105 EFI Wiring Harness - Unterminated Main Harness for HP and Dominator EFI
- Regular price
- $571.95 USD
- Regular price
-
$571.95 USD - Sale price
- $571.95 USD
- Unit price
- per
Vendor : HOLLEY
Product Type : Ignitions and Electrical
Sku : HLY558-105
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✔ Veteran-Owned Business | ✔ Verified Fitment (SEMA Data) | ✔ Ships 1–3 Business Days | ✔ 30-Day Returns
The Holley 558-105 EFI Wiring Harness is an unterminated main harness designed for Holley HP and Dominator EFI systems. Its universal, un-terminated configuration provides a wiring foundation for applications requiring a customized harness installation.
Because the harness is supplied unterminated, connection work can be completed to suit the specific installation. This format is intended for builds where wiring layout and termination requirements need to be addressed during installation rather than relying on a pre-terminated harness configuration.
Use the Holley 558-105 as a main harness solution for compatible HP or Dominator EFI projects. Verify system requirements and installation details before beginning work to ensure the harness configuration is appropriate for the intended application.
Features:
- Brand: Holley
- Part Number: 558-105
- Harness Type: Main EFI wiring harness
- Configuration: Universal and unterminated
- EFI Compatibility: Designed for Holley HP and Dominator EFI systems

