Holley EFI Terminator X Max GM Gen V LT4 Direct Injection Kit

Holley EFI Terminator X Max GM Gen V LT4 Direct Injection Kit

The Holley Terminator X Max LT4 Kit gives you complete control of your Gen V LT engine with self-learning fuel strategies, integrated GDI control, and race-proven EFI technology—all at a budget-friendly price. Designed for both swaps and high-performance builds, this system replaces the limitations of the factory ECU with powerful, user-friendly tuning.

Key Features

• Plug-and-play control for GM Gen V LT engines (GDI & VVT)
• Includes external direct injection controller
• 3.5" touchscreen handheld with calibration wizard
• Drive-by-wire throttle & transmission control (4L60 / 4L80)
• Real-time self-learning fuel system
• Built-in 1 Bar MAP sensor (external supported for boost)
• Wideband O2 (Bosch LSU 4.9) included
• 4 Inputs / 4 Outputs for fans, boost, nitrous, and more
• Integrated data logging and free Holley EFI software

Additional Info

Ideal for engine swaps, street builds, or boosted race applications. Base maps are included to get you running quickly, while advanced tuning tools allow full customization.

Note: Early vs late LT applications are identified by the fuel pressure sensor (4-pin = early, 3-pin = late).