Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Holley EFI Transmission Harness - T-56 558-481Terminator X Max ECUs on V3 Build 100 or later Holley EFI V6 Build 300 or later Features: Specs: Brand Holley EFI Connector Quantity 4 Emission Code 3 Grade Type Performance Harness Application GM Harness Type Transmission Product Type Transmission Harness Warning California Proposition 65 Application: Year Make Model Submodel
Terminator X Max ECUs on V3 Build 100 or later - Holley EFI V6 Build 300 or later
Features:
Specs:
| Brand | Holley EFI |
|---|---|
| Connector Quantity | 4 |
| Emission Code | 3 |
| Grade Type | Performance |
| Harness Application | GM |
| Harness Type | Transmission |
| Product Type | Transmission Harness |
| Warning | California Proposition 65 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
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
4.5 ★★★★★
Based on 660 reviews
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Product Reviews
★★★★★ 5
Fit perfect
Color: Soft Lavender, Size: X-Large
The fit was perfect. Love the colors. Quality of the shirt is very good especially for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 4
Travel shirts
Color: Blush Pink, Size: XX-Large
Their very well made and a good value but not even close to being was and wear.
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Reviewed in the United States on April 18, 2026
★★★★★ 5
cotton blend
Color: Blush Pink, Size: X-Large Tall
The item says it is 55% cotton and 45% polyester. In fact the shirt label says 100% cotton. Very satisfied with the shirt as it looks good, wears good, and a nice shirt overall
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Great fit
Color: Crisp White, Size: Small
Shirt is great. Nice fabric.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Good quality
Color: Crisp White, Size: Medium
Fit is great, feels like a durable material. Generally a very nice shirt! Bought this for a 5’ 10” male who is 150lbs. Medium was just right, with a little bit of breathing room.
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Reviewed in the United States on May 14, 2026