Unlock the full potential of your Terminator X and Terminator X Max ECU with our free PC software download. Take control of your Fuel Tables, Timing Tables, Idle Control, DBW …

Introducing the Terminator X Software from Holley EFI. Allowing you full tuning access to the Terminator X and Terminator X MAX ECU. This free software provides access to all of the …

Nov 22, 2024 · While we recommend using the latest software and firmware versions for the best performance and compatibility, these older versions are available to help users retrieve …

Nov 12, 2025 · Built specifically for use with Holley’s Terminator X EFI systems, this app gives you advanced tuning capabilities in a streamlined, mobile-friendly interface. Perfect for racers, …

Holley EFI Tools Holley EFI Manuals/Drawings/Information Click on Each Item and it will begin to download or open for you. If you don't see what you need or need further assistance, don't …

For complete wiring diagrams, instructions and tuning info, you will need to download the Holley EFI software from Holley. See below in remote tuning help for more info and a link.

Designed for Terminator X V3 Build 110 and later, the Time-Based Traction Management is intended for drag racing, standing mile events, or other racing that starts from a stop. Traction …

Jun 25, 2025 · Take control of your engine’s performance with 250+ CUSTOMIZABLE PARAMETERS FOR PRECISE TUNING. Designed for enthusiasts and professionals alike, …

Introducing the latest software upgrade from Holley EFI! Holley V5 software not only features Integrated Traction Control, but also allows you to completely customize up to 3 sets of injectors.

Shop Holley Terminator X Software at Holley.com. Free shipping on orders $149+ and world-class support for every build.