Holley Terminator X Bluetooth Module with cable on a white background
Black holley Terminator X wireless tuning module on a white background
A Holley EFI Bluetooth interface screenshot showing a grid of control icons labeled Fuel, Sensors, Spark, Idle, System, Drive By Wire, Nitrous, Boost, Transmission, Traction, Advanced, Inputs/Outputs, with a bottom navigation bar.
A Holley EFI Bluetooth digital display featuring two large black gauges labeled TERMINATOR RPM and AIR/FUEL RATIO, with a central illuminated status screen showing battery, MAP, CTS, and MAT readings.
A black Holley 558-483 Bluetooth adapter with a small connector on one end and a black rectangular mounting or control module on the other, photographed on a plain white background.
Black Terminator X smartphone tuning cable with connectors on a white background
Holley Terminator X Bluetooth Module with cable on a white background
Black holley Terminator X wireless tuning module on a white background
A Holley EFI Bluetooth interface screenshot showing a grid of control icons labeled Fuel, Sensors, Spark, Idle, System, Drive By Wire, Nitrous, Boost, Transmission, Traction, Advanced, Inputs/Outputs, with a bottom navigation bar.
A Holley EFI Bluetooth digital display featuring two large black gauges labeled TERMINATOR RPM and AIR/FUEL RATIO, with a central illuminated status screen showing battery, MAP, CTS, and MAT readings.
A black Holley 558-483 Bluetooth adapter with a small connector on one end and a black rectangular mounting or control module on the other, photographed on a plain white background.
Black Terminator X smartphone tuning cable with connectors on a white background

Holley EFI Terminator X Bluetooth Module

558-483

$238.95
/
Shipping calculated at checkout.

The Holley EFI Terminator X Bluetooth Module brings wireless tuning and real-time engine monitoring to your Terminator X or Terminator X Max EFI system. Simply plug the module into the ECU's CAN bus and connect your compatible iOS or Android smartphone to access tuning functions, live engine data, and customizable digital gauges—without connecting a laptop.

Using the free Holley Terminator X mobile app, you can perform basic and advanced tuning adjustments, change rev limiter settings, configure inputs and outputs, monitor engine vitals, and run the built-in Terminator X Setup Wizard directly from your phone. The Bluetooth module also works alongside compatible Holley digital dashes, making it an excellent upgrade for builders who want greater flexibility when tuning or monitoring their EFI-equipped vehicle.

Includes:

  • (1) Holley EFI Terminator X Bluetooth Module

Note: Compatible only with Holley Terminator X and Terminator X Max EFI systems. Currently available for use in the USA and Canada.

Specifications
Specification Details
Manufacturer Holley EFI
Part Number 558-483
Product Type Bluetooth Wireless Interface Module
User Interface Bluetooth
Communication CAN Bus
Connection Type Plug-and-Play
Compatible Devices iOS & Android Smartphones
Tablet Support Not Currently Supported
Color Black
Fitment

Compatible With:

  • Holley Terminator X EFI Systems
  • Holley Terminator X Max EFI Systems
  • Holley Terminator X Mobile App (iOS)
  • Holley Terminator X Mobile App (Android)

Fitment Notes:

  • Connects directly to the Terminator X CAN bus using the supplied plug-and-play connector.
  • Compatible with smartphones only; tablets are not currently supported.
  • May be used by itself or alongside compatible Holley digital dashes.
  • Not compatible with HP EFI, Dominator EFI, or Sniper EFI systems.
FAQ

What can I do with the Bluetooth Module?

The Bluetooth Module allows you to wirelessly connect your smartphone to your Terminator X ECU, giving you access to the Setup Wizard, live engine data, basic and advanced tuning, rev limiter adjustments, input/output configuration, and customizable digital gauges.

Do I still need a laptop?

For many common tuning adjustments, no. Most basic and advanced tuning changes can be made directly through the Holley Terminator X mobile app. A laptop may still be preferred for extensive calibration work or file management.

Can I use my phone as a digital dashboard?

Yes. The mobile app includes customizable gauge layouts and live engine monitoring, allowing your smartphone to function as a configurable digital dashboard while driving.

Is installation difficult?

No. The module plugs directly into the Terminator X CAN bus using a secure Mizu-style connector. No wiring modifications or ECU reprogramming are required to install the module.

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