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 complete standalone EFI system designed specifically for GM LS 4.8, 5.3, and 6.0 truck engines. It offers advanced self-tuning capabilities, real-time fuel learning, and integrated transmission control to deliver precise engine management and improved performance. This system is ideal for enthusiasts looking to upgrade from stock or junkyard ECUs to a reliable, user-tuneable solution with race-proven Holley technology.

Key Features

• Designed for GM LS 4.8/5.3/6.0 Truck Engines with 24x crank reluctor and Multec 2 injectors
• Real-time fuel map learning simplifies tuning and optimizes fuel delivery
• Integrated 1 bar MAP sensor for naturally aspirated or nitrous applications, with optional higher boost sensor support
• Supports boost control, progressive nitrous control, and advanced ignition timing management
• Includes 3.5” full-color touchscreen handheld with calibration wizard and data logging
• Plug-and-play harnesses for engine, transmission (4L60E/4L80E), and wideband oxygen sensor included
• Supports CAN-BUS integration and multiple Holley EFI accessories
• Self-tuning and user-tuneable with free Holley EFI software for full control

Fitment

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

Note: Verify engine and transmission compatibility before ordering. This system does not support low impedance injectors or drive-by-wire throttle bodies. Fuel injectors, fuel pump, and other supporting components are not included and may be required for installation.