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FuelTech - FT550 to FT600 Adapter Harness

Marsoni M251S
Sale price$161.47
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FuelTech - FT550 to FT600 Adapter HarnessFueltech FT550 Harness to FT600 ECU Adapter The FuelTech FT550 to FT600 adapter harness is the fastest way of using an FT600 on an existing FT550 LS Complete Harness. Offers plug and play installation for a FT550 LS Complete Harness to FT600 ECU In order to use all inputs and outputs of the FT600, extra 10 and 12 Way Connectors are needed (Or repined for a different connector) Also compatible to use a FT550 LS Harness on an FT700 ECU Adapts the dual
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.7 ★★★★★
Based on 856 reviews
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Verified Purchase
Gregory
Los Angeles, US
★★★★★ 4
2021 JL Jeep
Size: 16AWG -10FT 2Pin DT
I used these to plug in my mopar lights for my wrangler. Matched right up to the factory plugs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2025
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Verified Purchase
Shawn Moore
Draper, US
★★★★★ 5
Don’t hesitate
Size: 16AWG -10FT 2Pin DT, Size: 16AWG -10FT 2Pin DT
These harness extenders are great quality for the price. Don’t go with any other brand but this one 10/10
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Reviewed in the United States on October 2, 2025
N
Verified Purchase
Nicholas Skleba
Phoenix, US
★★★★★ 5
Inexpensive
Size: 16AWG -10FT 2Pin DT
Good value, inexpensive way to extend other wiring. Decent materials and seem close to OEM.
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Reviewed in the United States on April 19, 2025
T
Verified Purchase
Thompson Payne
San Leandro, US
★★★★★ 5
Great quality
Size: 16AWG -10FT 2Pcs
Worked perfect for my 212 predator mini bike. Easy to install and looks great. High quality product.
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Reviewed in the United States on May 4, 2026
A
Verified Purchase
Austin Ferguson
Birmingham, US
★★★★★ 5
Works Perfectly for My Light Bar Setup!
Size: 16AWG -10FT 2Pcs
The Nilight 16 AWG Wiring Harness Extension Kit made installing my LED light bar so much easier. The wires are thick, durable, and exactly the right gauge for a reliable connection. The 10-foot length gave me plenty of room to work with, and everything connected smoothly without any issues. Feels like solid quality, and I appreciate that it comes with a 2-year warranty. Great value and highly recommended for anyone wiring up off-road lights or accessories.
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Reviewed in the United States on October 4, 2025

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