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

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

The Holley EFI Terminator X Max – Gen III 4.8/5.3/6.0 GM Truck Engines is a powerful, budget-friendly standalone EFI system designed specifically for GM LS truck engines with 24x crank reluctor and Multec 2 injectors. It offers complete engine control with self-learning fuel strategies, transmission control for 4L60E/4L80E, and advanced tuning features to help you get the most out of your build—whether naturally aspirated or boosted.

Key Features

• Real-time fuel map learning for easy tuning
• High impedance injector drivers compatible with stock LS and Holley EFI injectors
• Integrated 1 bar MAP sensor with vacuum hose adapters, ideal for N/A and nitrous setups
• 4 programmable inputs and 4 outputs for accessories like fans, boost control, and nitrous
• Boost control with multiple strategies and safeties
• Single-channel wet or dry nitrous control with progressive options and AFR safeties
• Advanced tuning tables, including per gear and custom tables
• On-board diagnostic LEDs for quick troubleshooting
• Includes USB/CAN tuning cable; software supports full laptop tuning and multiple base calibrations
• Compact ECU size for flexible mounting
• Plug-and-play compatibility with Holley EFI accessories and digital dashboards
• Supports E85, datalogging, knock retard, accelerometer, coil-per-cylinder ignition, and individual cylinder fuel corrections

Fitment

• GM Gen III 4.8L, 5.3L, and 6.0L LS truck engines with 24x crank reluctor
• Compatible with 4L60E and 4L80E transmissions for integrated control

Note: This kit does not include fuel injectors, fuel pump, fuel hose, distributor, or mounting hardware. Requires use of Holley Terminator X Software for initial setup and tuning. Verify compatibility before installation.