Terminator X

UNLOCK THE NEXT LEVEL OF TUNING CONTROL FOR YOUR VEHICLE with the Holley Terminator X EFI mobile app — the ultimate companion for performance tuning right from your Android device.

Take control of your engine’s performance with 250+ CUSTOMIZABLE PARAMETERS FOR PRECISE TUNING. Designed for enthusiasts and professionals alike, the Holley Terminator X EFI app lets you FINE TUNE ENGINE PARAMETERS FOR MAXIMUM PERFORMANCE — all from the convenience of your mobile device.

Key Features:

· Six pre-defined real-time monitoring screens for instant access to vital engine data

· Intuitive setup wizard helps you easily create a powerful base tune in minutes

· View real-time gauges on screen at a glance – no laptop required

· Effortlessly create, manage, and share your tuning files with others

· Record and share datalogs to review your performance anytime, anywhere

· Simple, step-by-step Throttle Position Sensor (TPS) setup for accurate control

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, tuners, and performance enthusiasts — take your tuning to the next level and keep your engine dialed in with Holley.


App Requires the Holley Bluetooth Module to connect to the Terminator X ECU.