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 engine management system designed specifically for GM LS 4.8, 5.3, and 6.0 truck engines with 24x crank reluctor and Multec 2 injectors. It offers advanced self-learning fuel strategies, integrated transmission control, and comprehensive tuning capabilities to help you maximize performance and reliability on the street or track.

Key Features

• Real-time fuel map learning for easy, precise tuning
• High impedance injector drivers supporting stock and Holley EFI injectors
• Integrated 1 bar MAP sensor with adapters for vacuum and nitrous applications
• 4 programmable inputs and 4 outputs for electric fans, boost control, nitrous, and more
• Built-in boost and nitrous control with safety features and closed loop AFR targeting
• Advanced multi-dimensional tables for custom tuning including flex fuel and safety parameters
• Compact ECU with diagnostic LEDs and included 3.5″ touchscreen handheld with calibration wizard
• Supports 4L60E/4L80E transmission control and CAN-BUS integration
• Includes complete wiring harnesses, Bosch LSU 4.9 wideband sensor, and vacuum adapters
• Free Holley EFI software for laptop tuning and data logging

Fitment

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

Note: Verify compatibility with your specific engine and transmission setup before ordering. Requires basic tuning knowledge for optimal performance. Does not support low impedance injectors or drive-by-wire throttle systems.