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- USA
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27
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Description
FAST Wiring Harness FAST XFIFAST offers several main harness options to aC Commodate most customers' needs. The XFI Main Harness is responsible for connecting your XFI ECU to sensors as well as digital dashes, EGT modules, and various optional accessories. The Main Harness also handles communication between the ECU and ignition devices. Main harnesses are available in TPI, LT 1, LS 1 through 9 (including truck suv designs), Modern HEMI, Carburetor Conversions and even Rear
FAST offers several main harness options to aC-Commodate most customers' needs. The XFI Main Harness is responsible for connecting your XFI ECU to sensors as well as digital dashes, EGT modules, and various optional accessories. The Main Harness also handles communication between the ECU and ignition devices. Main harnesses are available in TPI, LT-1, LS-1 through 9 (including truck/suv designs), Modern HEMI, Carburetor Conversions and even Rear-Engine Dragsters and Boats. FAST also offers Main Harnesses that come terminated on the sensor side but non-terminated on the ECU side to allow for a truely custom fit. All terminals, seals and connectors are available individually, so don't hesitate to try your hand at crafting your own custom harness from start to finish.Warranty
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Catalog
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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
4.0 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
They look great and work great!
Size: 12 Pairs
Great contact screws with bare wires and solid inserting with the banana clips! Would buy again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026
★★★★★ 5
Easy
Size: 12 Pairs
Easy to use.
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Reviewed in the United States on April 30, 2026
★★★★★ 3
Not sure how it works
Size: 6 Pairs
Appears to tight a space for two wires to travel through and be connected
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Reviewed in the United States on April 27, 2025
★★★★★ 5
Good quality
Size: 2 Pairs
These are nice connectors that I bought for some electronic box to record my vinyl and cassette collection onto my new desktop computer. I needed a second set of wires to go to a pair of JBL l100s so that I can hear what I'm recording I guess. This box I'm speaking of was recommended by Google Gemini and I can't get it to update so don't know what to do now. Also because of Gemini, I ordered HDMI cables to replace my 10-year-old ones and bought this brand and forgot to use the 10% discount that they offered. The HDMI cables are really great too
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Reviewed in the United States on October 16, 2025
★★★★★ 5
Worked good
Worked well on my 84 115 tower of power
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Reviewed in the United States on March 25, 2026
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