Holley 558-420 Terminator EFI Input/Output Wiring Harness
- Regular price
- $56.25 USD
- Regular price
-
$56.25 USD - Sale price
- $56.25 USD
- Unit price
- per
Vendor : HOLLEY
Product Type : Ignitions and Electrical
Sku : HLY558-420
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✔ Veteran-Owned Business | ✔ Verified Fitment (SEMA Data) | ✔ Ships 1–3 Business Days | ✔ 30-Day Returns
The Holley 558-420 EFI Wiring Harness is designed for use with Holley Terminator EFI systems. This input/output harness provides the wiring connection point for supported EFI input and output functions.
Built as a dedicated wiring harness kit for Terminator EFI applications, the 558-420 offers an organized solution for connecting the system’s input and output circuits. Its application-specific design helps simplify wiring installation and service.
This Holley EFI wiring harness is supplied as an individual kit and is identified by part number 558-420. Verify system requirements before purchase to confirm suitability for your Terminator EFI setup.
Features:
- Brand: Holley
- Part Number: 558-420
- Product Type: EFI input/output wiring harness
- Application: Holley Terminator EFI
- Configuration: Wiring harness kit
- Quantity: Each

