I would like to ask whether it is an ordinary signal line that does not contain any programs and protocols?

Ordinary signal line although to use this line on a laptop to tune you’ll need to download the Holley tuning software

Does this work on a holley efi sne-550-511d and does this replace the existing cable to the touchscreen?

It should work with your part number. The actual unit is the same as the 550-511. As far as where it connects, yes, you disconnect the touchscreen and connect your cable directly to the touchscreen connector ON THE EFI UNIT! then plug the other end to your USB and go to town with the Holley Desktop Software.

Does anyone know what the holley end of the plug is called? can i buy just that plug and make my own cable? $60 for a usb cable seems a bit much.

I think it's a Mizu P25 Connector, however I wouldn't be surprised if the USB cable has some electronics inside the end to convert communications.

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Holley EFI 558-443 CAN to USB Dongle - Communication Cable

Product ID: 60323683

Details

Brand
Holley EFI
Connector Type
Usb
Cable Type
usb/can
Compatible Devices
ECU (Engine X
Recommended Uses For Product
Tuning and in

🔌Seamless CAN to USB data transfer

⚙️6-pin robust connector design

🛠️Durable, high-quality materials

₩219969

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Description

🔧 Tune smarter, not harder — the ultimate CAN to USB bridge for your ECU!

BUILT TO ENDURE - Crafted from premium materials to withstand indoor and outdoor automotive environments.
TRUSTED PERFORMANCE - Backed by Holley EFI’s legacy and a 4.7-star rating from 650+ enthusiasts.
COMPACT LIGHTWEIGHT - Weighing just 4 ounces, it’s the perfect portable tool for on-the-go pros.
PLUG PLAY PRECISION - Effortlessly connect your ECU with Holley EFI software for instant tuning power.
UNIVERSAL COMPATIBILITY - Works flawlessly with Holley EFI, Sniper EFI, and Terminator X tuning platforms.

The Holley EFI 558-443 CAN to USB Dongle is a rugged, high-performance communication cable designed for seamless ECU tuning. Compatible with Holley EFI, Sniper EFI, and Terminator X software, it features a durable 6-pin connector and premium materials to ensure reliable data transfer in any environment. Trusted by automotive pros and backed by a strong customer rating, this compact dongle is essential for precision vehicle programming.

Specifications

ASIN	B0741JVTTS
Best Sellers Rank	#46,934 in Automotive ( See Top 100 in Automotive ) #134 in Automotive Replacement Electrical Wiring Harnesses
Brand	Holley EFI
Brand Name	Holley EFI
Cable Type	usb/can
Color	Black
Compatible Devices	ECU (Engine Control Unit) with Holley EFI, Sniper EFI, and Terminator X Tuning Software compatibility Compatible Devices ECU (Engine Control Unit) with Holley EFI, Sniper EFI, and Terminator X Tuning Software compatibility See more
Compatible Phone Models	No Compatible Phone Models
Connector Gender	Male-to-Male
Connector Type	Usb
Customer Reviews	4.7 out of 5 stars 657 Reviews
Global Trade Identification Number	00090127006023
Included Components	Holley EFI 558-443 CAN to USB Dongle - Communication Cable
Indoor Outdoor Usage	Indoor, Outdoor
Item Shape	Round
Item Type Name	Holley EFI 558-443 CAN to USB Dongle - Communication Cable
Item Weight	4 ounces
Manufacturer	Holley EFI
Model	558-443
Model Name	Holley EFI 558-443 CAN to USB Dongle - Communication Cable
Number of Items	1
Number of Pins	6
Other Special Features of the Product	Data Transfer, Durable
Part Interchange Info	558-443
Part Number	HOL 558-443
Recommended Uses For Product	Tuning and programming vehicle ECUs in automotive applications
Special Feature	Data Transfer, Durable
Specification Met	SAE
UPC	090127006023
Unit Count	1 Count
Warranty Description	Manufacturer's Limited 90 Day Warranty

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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₩219969

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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