Description
Holley EFI Terminator X Max – 24x Early Truck with 6L80 Control
The Holley EFI Terminator X Max – 24x Early Truck with 6L80 Control is a complete EFI and transmission control system designed for Gen III GM truck LS engines with 24x crank reluctor and 6L80/6L90E transmissions. It delivers advanced tuning capabilities, real-time fuel learning, and integrated transmission management to maximize performance and drivability for street or race applications.
Key Features
- Integrated control for GM 6L80/6L90E transmissions via CAN communication with internal TCM
- 3.5-inch touchscreen handheld with calibration wizard, data logging, and gauge display
- Real-time fuel map learning and high impedance injector drivers (supports Multec 2 injectors)
- On-board 1 BAR MAP sensor, Bosch LSU 4.9 wideband sensor included for precise AFR control
- Four programmable inputs and outputs for accessories like electric fans, boost control, and nitrous
- Supports advanced boost and nitrous control including progressive wet/dry nitrous with safeties
- Torque management and tap up/down shift modes configurable via included transmission tuning handheld
- Compact ECU size for versatile mounting with diagnostic LEDs for quick troubleshooting
- Free Holley EFI software suite for laptop tuning and advanced calibration access
- Plug-and-play compatible with Holley EFI accessories including gauges and digital dash modules
Fitment
- Gen III GM Truck LS engines with 24x crank reluctor
- GM 6L80 and 6L90E automatic transmissions (2007 and newer)
Note: Requires installation of supplied transmission handheld tuner for setup and shift tuning. Verify compatibility with your specific engine and transmission before ordering. High impedance injectors only; does not control low impedance injectors. Additional tuning and wiring expertise recommended for optimal results.










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