A coiled black Holley EFI CAN to USB cable with a USB-A connector on one end and a small multi-pin connector with orange and black wires on the other, shown on a white background.
A close-up of a Holley Terminator X laptop tuning cable with a black connector housing and a light green insulator, showing two exposed copper wires, on a white background.
A close-up of a black Holley Sniper EFI USB communication cable with a silver USB-A plug, showing the embossed brand name &
A close-up of a black Holley EFI 558-443 CAN bus cable with a multi-pin connector, showing orange wire strands and a light green insulator, on a white background.
A coiled black Holley EFI CAN to USB cable with a USB-A connector on one end and a small multi-pin connector with orange and black wires on the other, shown on a white background.
A close-up of a Holley Terminator X laptop tuning cable with a black connector housing and a light green insulator, showing two exposed copper wires, on a white background.
A close-up of a black Holley Sniper EFI USB communication cable with a silver USB-A plug, showing the embossed brand name &
A close-up of a black Holley EFI 558-443 CAN bus cable with a multi-pin connector, showing orange wire strands and a light green insulator, on a white background.

Holley EFI CAN to USB-A Cable – Laptop Tuning Cable

558-443

$77.21
/
Shipping calculated at checkout.

The Holley EFI CAN to USB-A Communication Cable provides a direct connection between your Holley EFI system and a Windows laptop, giving you full access to Holley's free EFI tuning software for live tuning, calibration changes, datalogging, diagnostics, and firmware updates.

Featuring an integrated CAN Bus to USB converter, an 8-foot cable length, and a protective wire sleeve, this communication cable is designed for reliable tuning in the shop or at the track. It is compatible with Dominator EFI, HP EFI, Sniper EFI (Gen 1), and Terminator X systems running current software.

Bonus: On Holley Sniper EFI systems, the CAN Bus cable may be spliced to allow both the Holley touchscreen and the USB communication cable to remain connected simultaneously.

Includes:

  • (1) Holley EFI CAN to USB-A Communication Cable
  • Integrated CAN Bus to USB Converter
  • Protective Wire Sleeve
Specifications
Specification Details
Manufacturer Holley EFI
Part Number 558-443
Product Type CAN Bus to USB-A Communication Cable
Cable Length 8 ft
USB Type USB-A
Converter Integrated CAN Bus to USB Converter
Wire Protection Protective Wire Sleeve
Color Black
Fitment Specific Holley EFI Applications
Fitment
Holley EFI System Compatibility
Dominator EFI Compatible
HP EFI Compatible
Sniper EFI (Gen 1) Compatible
Terminator X Compatible with Updated Software

Fitment Notes

  • Designed for Holley EFI systems equipped with a CAN Bus communication port.
  • Allows laptop communication for tuning, diagnostics, datalogging, and firmware updates.
  • Requires Holley EFI tuning software installed on a compatible Windows computer.
  • Not compatible with ARM/Snapdragon-based Windows processors.
  • Software updates are available through Holley's Support website.
Tech Insight

1. What does this cable do?

This cable creates a direct communication link between your Holley EFI ECU and a laptop, allowing you to tune, monitor, datalog, update firmware, and diagnose your EFI system using Holley's free tuning software.

2. Can I still use my Holley handheld?

Yes. On Holley Sniper EFI systems, the CAN Bus wiring can be spliced to allow both the touchscreen handheld and the USB communication cable to remain connected at the same time.

3. Does this cable contain a converter?

Yes. The CAN Bus to USB converter is built directly into the cable, eliminating the need for additional interface modules.

4. How long is the cable?

The cable measures 8 feet long, providing plenty of length for tuning inside the vehicle or while working in the shop.

5. Will it work on every Windows computer?

The USB driver is not compatible with Windows computers using ARM or Snapdragon processors. A standard x86/x64 Windows laptop is recommended for reliable communication.

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