Holley EFI Terminator X – Gen III 4.8/5.3/6.0 GM Truck Engines

Holley EFI Terminator X – Gen III 4.8/5.3/6.0 GM Truck Engines

The Holley EFI Terminator X – Gen III 4.8/5.3/6.0 GM Truck Engines is a fully integrated standalone EFI system designed specifically for GM LS truck engines with a 24x crank reluctor and Multec 2 injectors. It offers self-learning fuel strategies and advanced tuning features to give you complete control over fuel, spark, boost, and nitrous management—perfect for enthusiasts building powerful, reliable American V8 trucks.

Key Features

• Real-time fuel map learning for easy tuning and optimal performance
• High impedance injector drivers compatible with stock LS and Holley EFI injectors
• Integrated 1bar MAP sensor with vacuum hose adapters included
• 4 programmable inputs and 4 outputs for fans, boost control, nitrous, and more
• Supports boost control with multiple boost vs. parameters and safeties
• Single and multi-stage nitrous control with progressive and safety features
• Advanced tables for custom tuning, including gear-based and 1D/2D maps
• Compact ECU with diagnostic LEDs for quick troubleshooting
• Includes 3.5″ touchscreen handheld with calibration wizard and data logging
• Plug-and-play harnesses and wideband oxygen sensor included
• Supports E85, knock retard, coil-per-cylinder ignition, and CAN-BUS

Fitment

• GM Gen III LS Truck Engines – 4.8L, 5.3L, and 6.0L with 24x crank reluctor
• Engines using Multec 2 injector connectors

Note: Verify compatibility with your specific LS engine variant before ordering. Installation requires basic wiring knowledge; tuning software and handheld controller included for user-friendly setup.