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FuelTech - FT550 to FT600 Adapter Harness
FuelTech - FT550 to FT600 Adapter Harness
FuelTech - FT550 to FT600 Adapter Harness
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FuelTech - FT550 to FT600 Adapter Harness

Marsoni M251S
Sale price$161.47
Pay 4 payments of $40.37 a month.Shop Pay
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
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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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4.9 ★★★★★
Based on 2146 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
New York, US
★★★★★ 5
The perfect sock!
Size: 6-10, Color: Halo Gray/Assorted
The only socks that I can wear with my hey dudes. They stay on my ankles and never slid down into the shoe. I will forever order these as long as they are available. They are comfy too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 21, 2025
R
Verified Purchase
Ryan S
Port Orchard, US
★★★★★ 5
Good option, especially in warmer weather
Size: 6-10, Color: Black
High quality socks and very durable. Nice touch adding the grip on the back of the ankle so the sock stays up. Size is a true fit to the size of your foot as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2025
P
Verified Purchase
Patricia
Chelsea, US
★★★★★ 5
Love these socks!
Size: 6-10, Color: White
Comfortable, no show, and most importantly The Do No Slip!!!! I keep coming back to add to my supply because they have become the only sock I wear. I’ve been using them for a couple years now and they hold to great to washing, bleaching and the dryer. Highly recommended.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 24, 2024
B
Verified Purchase
BoyMom
Bozeman, US
★★★★★ 5
The only socks I will buy
Size: 6-10, Color: Halo Gray/Assorted
These are hands down my favorite socks to wear with tennis shoes. Bought my original 6 pack in the store, liked them so much I went buy more and they were gone. These don't slip on your heel like most socks do. Come up high enough on the top of your foot to protect from tongue rubbing (I giggled when I wrote that) and they come in fun colors. Love they are ultra no show and provide padding but people can't see them with shoes on. Five stars!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2023
S
Verified Purchase
Sam K.
Alexandria, US
★★★★★ 5
Socks
Size: Medium, Color: Black
Amazing socks. Fits Amazing. I tried to buy the six pack and it wasn’t the same. Thinner material. The 3 pack is great. Would buy again if it comes up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 16, 2025

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