Holley EFI Terminator X – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3

Holley EFI Terminator X – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3

The Holley EFI Terminator X – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3 is a compact, self-tuning EFI system designed to replace your factory ECU and give you complete control over your GM LS engine’s fuel and spark. Built for Gen IV LS engines with 58x crank and 4x cam sensors, this system supports EV1 injectors and includes a 3.5″ touchscreen handheld for easy setup and tuning. Perfect for street or race applications, it offers advanced features at a budget-friendly price.

Key Features

• Real-time fuel learning for precise tuning without guesswork
• High impedance injector drivers compatible with most stock LS injectors
• Integrated Bosch LSU 4.9 wideband oxygen sensor for accurate AFR readings
• 4 programmable inputs and 4 outputs for fans, boost control, nitrous, and more
• Boost control with multiple strategies and nitrous control with progressive and multi-stage options
• On-board diagnostic LEDs for quick engine status checks
• Compact ECU with versatile mounting options
• Includes base maps for common LS engine setups and free Holley EFI tuning software

Fitment

• Gen IV GM LS engines: 4.8L, 5.3L, 6.0L truck engines, LS2, and LS3

Note: Verify compatibility with your engine and injector type before ordering. This system does not support low impedance injectors or drive-by-wire throttles. Installation requires basic wiring knowledge and tuning experience is simplified with the included handheld and software.