Holley EFI Terminator X Max – LS1/LS6

Holley EFI Terminator X Max – LS1/LS6

The Holley EFI Terminator X Max – LS1/LS6 is a powerful, budget-friendly standalone ECU designed for GM LS1 and LS6 engines with 24x crank reluctor and EV1 injectors. It delivers precise fuel and ignition control, self-learning fuel strategies, and advanced features like boost and nitrous control, making it ideal for street or race applications.

Key Features

• Self-tuning with real-time fuel map learn for easy calibration
• High impedance injector drivers compatible with stock LS and Holley EFI injectors
• Integrated 1-bar MAP sensor with vacuum hose adapters; supports forced induction with optional sensor upgrade
• 4 programmable inputs and outputs for electric fans, boost control, nitrous activation, and more
• Boost control with multiple target options and safeties
• Progressive wet and dry nitrous control with closed-loop AFR targeting
• Advanced customizable tables for fuel, spark, and transmission control
• Includes 3.5″ touchscreen handheld with calibration wizard and data logging
• Compact ECU with diagnostic LEDs and wide compatibility with Holley EFI accessories

Fitment

• GM LS1 and LS6 engines with 24x crank reluctor and EV1 injectors
• Compatible with 4L60E and 4L80E transmissions for integrated control

Note: Verify engine and transmission compatibility before ordering. Tuning software and handheld are included for full user calibration. Forced induction setups may require an upgraded MAP sensor (sold separately).