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Description
Dominator EFI Auxiliary Harness - 558-401Overview: Used when adding a second wide band oxygen sensor to a Dominator EFI installation. Features: J2A Connector #2 Wide band oxygen sensor harness (Fully Terminated) 23 user programmable input wires with pre crimped ECU pins Application: Year Make Model Submodel Engine Size Universal Specs: Brand Holley EFI Emission Code 3 Harness Type Auxiliary Product Type J2 Auxiliary Input Output Harness Connector
Overview:
Used when adding a second wide band oxygen sensor to a Dominator EFI installation.
Features:
- J2A Connector
- #2 Wide band oxygen sensor harness (Fully Terminated)
- 23 user programmable input wires with pre-crimped ECU pins
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Emission Code | 3 |
| Harness Type | Auxiliary |
| Product Type | J2 Auxiliary Input/ Output Harness - Connector |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 3
Weird pockets
Size: Medium, Color: Brown
It was a nice coat but the fabric was shimmery and the front pockets were very high. It was very awkward looking. Overall it was nice fabric and a good length but the pockets and the shimmer made it a return for us.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Thin material
Size: X-Large, Color: Camel
Runs big
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Nice jacket
Size: Medium, Color: Grey 01
Nice jacket . Material exactly as described.
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Reviewed in the United States on February 3, 2026
★★★★★ 5
Value for money
Size: Large, Color: A-red
Exquisite; stylish.
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Reviewed in the United States on October 14, 2025
★★★★★ 5
Black mens coat
I didn't expect such good quality from such an inexpensive black coat, stylish, neat, looks expensive, none of my friends believed that I bought it so cheaply! No pellets appeared after a year and a half of use
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Reviewed in the United States on March 15, 2025