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 self-learning fuel strategies, integrated transmission management, and drive-by-wire throttle body support, making it ideal for enthusiasts seeking reliable performance and easy tuning at a budget-friendly price.

Key Features

• Designed for GM LS 4.8/5.3/6.0 truck engines and LS2/LS3 with 58x crank, 4x cam sensors, and 4L60E/4L80E transmissions
• Real-time fuel map learning removes guesswork from tuning
• High impedance injector drivers compatible with stock LS and Holley EFI injectors
• Integrated 1bar MAP sensor ideal for naturally aspirated or nitrous setups
• 4 programmable inputs and 4 outputs for fans, boost control, nitrous, and more
• Boost and nitrous control with safeties and progressive options
• On-board diagnostic LEDs for quick engine status checks
• Includes USB/CAN tuning cable and free Holley EFI software for laptop tuning
• Compact ECU for flexible mounting with plug-and-play compatibility with Holley EFI accessories
• Supports E85 fuel, coil-per-cylinder ignition, knock retard, datalogging, and advanced tables for custom tuning

Fitment

• GM Gen IV LS 4.8L, 5.3L, and 6.0L truck engines
• GM LS2 and LS3 engines
• 4L60E and 4L80E automatic transmissions

Note: Verify compatibility with your specific engine and transmission setup before ordering. Initial setup requires a laptop with Terminator X software; handheld tuner is not included.