Description
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 fully featured, budget-friendly EFI system designed to give you complete control over your LS engine’s fuel, spark, and transmission functions. Built for GM LS truck engines and LS2/LS3 platforms, this system includes real-time fuel learning, boost and nitrous control, and drive-by-wire throttle body compatibility to help you build a faster, more powerful vehicle with ease.
Key Features
- Supports GM LS 4.8/5.3/6.0 Truck Engines and LS2/LS3 with 58x crank and 4x cam sensors
- Integrated 1bar MAP sensor for naturally aspirated or nitrous setups; boost control included
- High impedance injector drivers compatible with stock LS and Holley EFI injectors
- 4 programmable inputs and outputs for accessories like electric fans, nitrous, and boost solenoids
- Drive-by-wire throttle body and 4L60E/4L80E transmission control included
- Real-time fuel map learning and advanced tuning tables for precise calibration
- Includes 3.5″ touchscreen handheld with calibration wizard, data logging, and gauge display
- Wideband Bosch LSU 4.9 oxygen sensor for accurate AFR monitoring
- Supports dry/wet nitrous, progressive nitrous control, knock retard, and coil-per-cylinder ignition
- Compatible with Holley EFI accessories and free Holley EFI laptop tuning software
Fitment
- GM LS 4.8L, 5.3L, and 6.0L Gen IV Truck Engines
- GM LS2 and LS3 engines with 58x crank and 4x cam sensors
- 4L60E and 4L80E transmissions with drive-by-wire throttle bodies
Note: Verify compatibility with your specific engine and transmission setup before ordering. Tuning and installation require basic EFI knowledge. Fuel injectors, fuel pump, and other hardware are not included.






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