4.7 · 3 reviews
SKU: 558-401

Dominator EFI Auxiliary Harness

$233.99
FREE delivery
Description

ABOUT THIS PRODUCT

Used when adding a second wide band oxygen sensor to a Dominator EFI installation.

Product Features:
  • J2A Connector
  • No. 2 Wide band oxygen sensor harness (Fully Terminated)
  • 23 user programmable input wires with pre-crimped ECU pins
Specifications
Brand
Holley EFI (770)
SKU
558-401
Product type
Automotive
Guides & Resources
User Guide
Returns Policy
Shipping Information

Free shipping on all orders. Most items ship next business day after your order is placed.

Returns Policy

Returns are accepted when the product is in its original, unopened container. Contact us if you have questions about your order.

View full returns policy

Customer Reviews

4.7

Based on 3 reviews

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10
R
Riley N. Verified Buyer
06/08/2025

No complaints

Quick delivery and the product exceeded my expectations.

M
Maria K. Verified Buyer
08/17/2025

Would buy again

Does what it is supposed to do. Happy with this purchase.

T
Ted R. Verified Buyer
02/03/2025

Works perfectly

Setup was simple and it has worked reliably since day one.

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