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 EFI system designed to give you complete control over your LS engine’s fuel and spark. Built for GM Gen IV LS truck engines and LS2/LS3 with 58x crank and 4x cam sensors, it supports drive-by-wire throttle bodies and EV6 injectors for modern performance applications.

Key Features

• Real-time fuel map learning for easy and precise tuning
• High impedance injector drivers compatible with stock LS and Holley EFI injectors
• Integrated 1bar MAP sensor ideal for naturally aspirated and nitrous setups
• 4 programmable inputs and 4 outputs for electric fans, boost control, nitrous, and more
• Supports boost control with multiple strategies and nitrous control with progressive and multi-stage options
• Includes Bosch LSU 4.9 wideband O2 sensor for accurate AFR feedback
• Compact ECU with onboard diagnostic LEDs and CAN/USB tuning cable included
• Plug-and-play compatibility with Holley EFI accessories and free tuning software

Fitment

• GM Gen IV LS truck engines 4.8L, 5.3L, and 6.0L
• LS2 and LS3 engines with 58x crank and 4x cam sensors
• Drive-by-wire throttle body equipped vehicles

Note: Requires use of free Terminator X software for initial setup; verify fitment and tuning compatibility before ordering. Injector support limited to high impedance types. No handheld controller included.