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, budget-friendly standalone ECU designed for GM LS truck engines and LS2/LS3 platforms. It delivers full engine control with advanced self-learning fuel strategies, wideband AFR feedback, boost and nitrous control, and transmission management for 4L60E/4L80E. Ideal for enthusiasts seeking precise tuning and performance upgrades without the complexity of junkyard ECUs.

Key Features

• Designed for GM LS 4.8/5.3/6.0 truck engines and LS2/LS3 with 58x crank, 4x cam sensors
• Real-time fuel map learning for easy tuning
• Integrated 1 bar MAP sensor with vacuum adapters; supports boost and nitrous control
• 4 programmable inputs and outputs for fans, boost solenoids, nitrous, and more
• Supports 4L60E/4L80E transmission control
• High impedance injector drivers compatible with stock LS and Holley EFI injectors
• Bosch LSU 4.9 wideband oxygen sensor included for accurate AFR monitoring
• Advanced tables for custom tuning including flex fuel and safety features
• CAN/USB tuning cable included; free Terminator X software for laptop tuning
• Compact ECU with diagnostic LEDs for quick troubleshooting
• Plug and play compatible with Holley EFI accessories and digital dash options

Fitment

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

Note: Requires laptop tuning with included USB/CAN cable; verify compatibility with your engine and transmission before ordering. Injector support limited to high impedance types. No handheld tuner included.