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 standalone EFI system designed specifically for GM Gen IV LS engines and LS2/LS3 platforms. It offers advanced self-tuning, real-time fuel learning, and comprehensive control over fuel, spark, and drive-by-wire throttle systems, making it ideal for enthusiasts looking to upgrade from factory ECUs or junkyard units and achieve precise engine management for street or track use.

Key Features

• Compatible with GM 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x crank, 4x cam, and drive-by-wire throttle body
• Real-time fuel map learning for easy and accurate tuning
• High impedance injector drivers support stock LS and Holley EFI injectors (not low impedance)
• Includes Bosch LSU 4.9 wideband oxygen sensor for precise AFR control
• On-board 1bar MAP sensor suitable for naturally aspirated and nitrous applications
• 4 programmable inputs and 4 outputs for accessories like electric fans, boost control, and nitrous
• Boost and nitrous control with multiple safety features and progressive control options
• Advanced customizable tables including gear-based and multi-dimensional tuning
• Diagnostic LEDs for quick engine status checks
• Includes 3.5″ touchscreen handheld with calibration wizard, data logging, and customizable gauges
• Compact ECU design with flexible mounting options (diagnostic LEDs must face upward)
• Plug-and-play compatibility with Holley EFI accessories and digital dash modules
• Free Holley EFI tuning software for full user control
• Includes complete wiring harnesses, wideband sensor, input/output harness, and vacuum adapters

Fitment

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

Note: Verify compatibility with your specific engine and drive-by-wire throttle system before ordering. Low impedance injectors are not supported. Installation requires basic wiring knowledge. Recommended pedal assembly part number 10379038 is sold separately.