Holley Terminator X Max LS2/LS3 & Late 58x/4x LS Truck MPFI Kit with Transmission Control

Take complete control of your LS-powered build with the Holley Terminator X Max LS2/LS3 & Late 58x/4x LS Truck MPFI Kit. Designed for late-model 58x crankshaft/4x camshaft LS engines, this advanced engine management system combines Holley's proven self-learning EFI technology with integrated electronic transmission control for 4L60E and 4L80E transmissions. Whether you're building a street car, engine swap, drag car, or boosted race application, Terminator X Max provides professional-level tuning features with an intuitive setup process.

Featuring real-time fuel learning, a Bosch LSU 4.9 wideband oxygen sensor, integrated 1-Bar MAP sensor, and an easy-to-use 3.5-inch touchscreen handheld, Terminator X Max makes getting your LS engine running quickly easier than ever while providing the flexibility advanced tuners demand.

Key Features

Designed for LS2, LS3, and late-model 58x/4x LS truck engines with EV6 injectors
Integrated 4L60E and 4L80E electronic transmission control
Real-time self-learning fuel table calibration
High-impedance injector drivers compatible with most stock and Holley EFI injectors
Integrated 1-Bar MAP sensor with support for optional 2-Bar and higher sensors
Bosch LSU 4.9 wideband oxygen sensor for precise air/fuel ratio control
Four programmable inputs and four programmable outputs
Advanced boost control and progressive nitrous control strategies
Multiple customizable 1D and 2D tuning tables
On-board diagnostic LEDs for quick troubleshooting
3.5" touchscreen handheld with setup wizard, gauge display, and data logging
Free Holley EFI tuning software for advanced laptop tuning

Kit Includes

Terminator X Max ECU
58x/4x LS Engine Main Harness
EV6 Injector Harness
4L60E/4L80E Transmission Control Harness
ECU Main Power Harness
Bosch LSU 4.9 Wideband Oxygen Sensor
Input/Output Harness
3.5" Touchscreen Handheld Controller
MAP Sensor Vacuum Hose Adapters
Installation Hardware

Fitment

GM LS2 and LS3 engines
Late-model 4.8L, 5.3L, and 6.0L LS truck engines with 58x crankshaft and 4x camshaft
EV6 fuel injector applications
4L60E and 4L80E electronically controlled automatic transmissions

Important Notes

Designed for high-impedance fuel injectors only. Low-impedance injectors are not supported.
Built-in 1-Bar MAP sensor is intended for naturally aspirated and nitrous applications. Forced induction applications requiring additional boost measurement will need a compatible 2-Bar or higher MAP sensor.
Supports Holley EFI accessories including digital dashes, gauges, shift lights, and additional expansion modules.
Professional installation and calibration are recommended for best performance and reliability.

Note: The Holley Terminator X Max combines professional-grade engine and transmission management with industry-leading self-learning technology, making it an ideal solution for everything from daily-driven LS swaps to high-horsepower street and race builds.