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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
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Description
Unterminated 15' Flying Lead Main Harness - 558-126Overview: The unterminated main harness comes with both J1A and J1B connectors full terminated with 15' of flying lead wiring. Features: 15 long flying lead harness, allows you to completely customize your main harness installation 60 Holley Crimped Wires (57x 20 ga, 3x 18 ga) 30 optional plug seals Application: Year Make Model Submodel Engine Size Universal Specs: Brand Holley EFI Emission Code 4 Harness Application Universal Harness Type Main
Overview:
The unterminated main harness comes with both J1A and J1B connectors full terminated with 15' of flying lead wiring.
Features:
- 15’ long flying lead harness, allows you to completely customize your main harness installation
- 60 Holley Crimped Wires (57x 20 ga, 3x 18 ga)
- 30 optional plug seals
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Emission Code | 4 |
| Harness Application | Universal |
| Harness Type | Main |
| Product Type | Universal Unterminated Main Engine Harness |
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
4.4 ★★★★★
Based on 160 reviews
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Product Reviews
★★★★★ 5
Comfortable Stretch Brief
Size: Medium, Color: Red Orange Yellow Blue
I purchased the cotton stretch Briefs for my husband and he says they are not only comfortable, but have a great fit. He’s very athletic and complained about how some of his briefs would shift when running or other activities. These do not! The fabric breaths and stays cool, and no chaffing. We’ll be getting a few more of these Stretch Briefs for sure!
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Reviewed in the United States on March 15, 2026
★★★★★ 5
True size!
Size: Medium, Color: Red Orange Yellow Blue
True fit for size. Extremely comfortable. Long lasting product.
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Reviewed in the United States on April 29, 2026
★★★★★ 4
Good quality
Size: X-Large, Color: Black
Perfect fit
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Reviewed in the United States on September 15, 2025
★★★★★ 5
Extremely comfortable
Size: Medium, Color: Red Orange Yellow Blue
I wore a popular name-brand contour pouch brief for a decade, but when their quality tanked, I started looking for a replacement. These are perfect! There is plenty of room in the pouch to keep everything in place during physical labor, and they offer full back coverage while maintaining a bikini-brief feel.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Excellent flyless low rise men’s briefs
Size: Medium, Color: Black
Try pleased with these flyless low rise briefs. Well made pouch with excellent collection of my equipment. The material is very soft and comfortable. The waist and leg areas are well constructed and fit very well to my form. I recommend these briefs as a 10/10.
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Reviewed in the United States on February 9, 2026