Holley EFI Terminator X Max – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3

Holley EFI Terminator X Max – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3

The Holley EFI Terminator X Max – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3 is a powerful, user-tuneable EFI system designed specifically for GM LS truck engines and LS2/LS3 platforms. It offers complete engine control with real-time fuel learning, advanced boost and nitrous management, and plug-and-play compatibility, making it ideal for enthusiasts building faster, more powerful American V8 vehicles.

Key Features

• Designed for GM LS 4.8/5.3/6.0 Truck Engines and LS2/LS3 with 58x Crank, 4x Cam, and 4L60E/4L80E transmissions
• Real-time fuel map learning simplifies tuning and optimizes performance
• High impedance injector drivers support stock LS and Holley EFI injectors
• Integrated Bosch LSU 4.9 wideband oxygen sensor for precise AFR control
• On-board 1 bar MAP sensor with adapters; supports boost control and nitrous management
• 4 programmable inputs and 4 outputs for electric fans, boost solenoids, nitrous, and more
• Boost control with multiple strategies including Boost vs Time, Gear, RPM, and Speed
• Progressive wet and dry nitrous control with safety features and closed-loop AFR targeting
• Advanced customizable tables for fuel, spark, transmission, and safety functions
• Diagnostic LEDs for quick engine status checks and troubleshooting
• Includes 3.5″ touchscreen handheld with calibration wizard, data logging, and gauge display
• Compact ECU design for flexible mounting with CAN-BUS support and wide compatibility
• Supports E85, knock retard, coil-per-cylinder ignition, individual cylinder fuel corrections, and more
• Free Holley EFI tuning software included
• Plug-and-play with Holley EFI accessories and modules

Fitment

• GM Gen IV LS 4.8L, 5.3L, and 6.0L truck engines
• LS2 and LS3 engines with 58x crank and 4x cam sensors
• 4L60E and 4L80E transmissions

Note: Verify engine and transmission compatibility before ordering. Installation requires basic wiring and tuning knowledge. Fuel injectors, fuel pump, and other supporting components are not included.