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 high-performance standalone ECU designed specifically for GM LS 4.8, 5.3, 6.0 truck engines and LS2/LS3 platforms. It delivers complete engine control with self-learning fuel strategies, advanced boost and nitrous management, and user-tuneable features to get your American V8 running stronger and faster.

Key Features

• Supports GM LS 58x crank and 4x cam sensors with 4L60E/4L80E transmission control
• Real-time fuel map learning for easy tuning and precise fuel delivery
• High impedance injector drivers compatible with stock LS and Holley EFI injectors
• Integrated Bosch LSU 4.9 wideband O2 sensor for accurate AFR monitoring
• On-board 1 bar MAP sensor with boost control and nitrous management capabilities
• 4 programmable inputs and 4 outputs for electric fans, boost solenoids, nitrous, and more
• Includes 3.5″ touchscreen handheld with calibration wizard and data logging
• Compact ECU design for flexible mounting with diagnostic LED indicators
• Plug-and-play harnesses for engine, injector, and transmission connections
• Supports E85 fuel, knock retard, coil-per-cylinder ignition, and individual cylinder fuel corrections

Fitment

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

Note: Verify compatibility with your specific engine and transmission setup before ordering. Requires supporting sensors and injectors; fuel pump and fuel hose are not included. Proper tuning is recommended for optimal performance.