


FuelTech - FT550 to FT600 Adapter Harness
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
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
Quick Dispatch:
Your FuelTech - FT550 to FT600 Adapter Harness orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your FuelTech - FT550 to FT600 Adapter Harness ships.
Need Help?
Questions about FuelTech - FT550 to FT600 Adapter Harness, sizing, or delivery? We're just an email away.
Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for FuelTech - FT550 to FT600 Adapter Harness in your area.
Get Shipping Estimates
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
You may also like
4.7 ★★★★★
Based on 856 reviews
Sort
Product Reviews
★★★★★ 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
★★★★★ 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
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 2, 2025
★★★★★ 5
Inexpensive
Size: 16AWG -10FT 2Pin DT
Good value, inexpensive way to extend other wiring. Decent materials and seem close to OEM.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2025
★★★★★ 5
Great quality
Size: 16AWG -10FT 2Pcs
Worked perfect for my 212 predator mini bike. Easy to install and looks great. High quality product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 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.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 4, 2025