Holley EFI Terminator X Max Gen III HEMI EFI Controller
2006–2012 Chrysler 5.7L / 6.1L / 6.4L GEN III HEMI Engines
550-1423
Overview:
The Holley EFI Terminator X Max Gen III HEMI EFI Controller is a cutting-edge engine management system designed specifically for Chrysler GEN III HEMI engines produced between 2006 and 2012. Compatible with the 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire (DBW) throttle body, this controller delivers precise fuel and ignition control for non-VVT applications. Whether you're upgrading a street machine, building a track-ready race car, or tuning a boosted setup, the Terminator X Max offers a comprehensive, plug-and-play solution that combines advanced features with user-friendly operation.
Equipped with real-time fuel learning and high impedance injector drivers, this EFI controller simplifies tuning and ensures optimal engine performance. The included 3.5-inch touchscreen handheld and Holley’s industry-leading software suite provide both novice and advanced tuners with intuitive tools to quickly dial in their setups and monitor critical engine parameters.
Key Features:
The Terminator X Max EFI Controller is packed with versatile features designed to maximize control and customization for your GEN III HEMI engine:
- Plug-and-play compatibility with 2006–2012 Chrysler 5.7L, 6.1L, and 6.4L GEN III HEMI engines using factory DBW throttle bodies (non-VVT only)
- High impedance injector drivers compatible with Holley EFI and most stock injectors (does not support low impedance injectors)
- Integrated Bosch LSU 4.9 wideband O2 sensors for precise air/fuel ratio monitoring and tuning accuracy
- Built-in 1 bar MAP sensor with the option to disable for external MAP sensor use, ideal for boosted applications
- Four programmable inputs and outputs supporting electric fans, boost control solenoids, nitrous activation, and more
- Advanced boost control options including boost vs. time, gear, RPM, speed, and built-in boost safeties
- Comprehensive nitrous control with channels for wet/dry, progressive or non-progressive operation, and closed-loop AFR targeting
- Multiple advanced tuning tables (1D and 2D) for fuel, spark, and other engine parameters, allowing nearly unlimited configuration
- Onboard diagnostic LEDs for quick status checks including ECU power, engine run, TPS calibration, and cam signal
- Compact ECU design measuring 7.45” x 4.1” x 1.66” for flexible mounting options
- Included EV6 injector harness and vacuum hose adapters (1/8”, 1/4”, and 3/16” sizes) for seamless installation
- Compatible with Holley EFI accessories such as gauges, shift lights, modules, and digital/pro dashes (Holley P/N 553-106, 553-111, 553-112)
Construction & Design:
The Terminator X Max EFI Controller is engineered with durability and compactness in mind. Its rugged enclosure protects sensitive electronics from harsh automotive environments while maintaining a small footprint for versatile mounting locations. The integrated sensors and high-quality Bosch wideband O2 sensors ensure reliable, accurate data acquisition critical for precise engine management. The handheld touchscreen interface is designed for ease of use, featuring a responsive LCD that simplifies calibration and real-time monitoring.
Installation & Fitment:
This EFI controller is designed for straightforward, plug-and-play installation on Chrysler GEN III HEMI engines from 2006 to 2012 equipped with factory Drive-by-Wire throttle bodies (non-VVT). The included EV6 injector harness and vacuum hose adapters facilitate a clean and efficient setup without the need for extensive modifications. The compact ECU size allows for flexible mounting options, but it is important to install the unit with the diagnostic LEDs facing upward for proper operation. The system also supports a wide range of Holley EFI accessories to expand functionality as needed.
What's Included:
- Holley EFI Terminator X Max Gen III HEMI EFI Controller ECU
- 3.5-inch touchscreen handheld controller with calibration wizard and gauge display
- EV6 injector harness compatible with high impedance injectors
- Bosch LSU 4.9 wideband O2 sensors for accurate air/fuel ratio measurement
- Built-in 1 bar MAP sensor with external MAP sensor harness connector
- Vacuum hose adapters in 1/8”, 1/4”, and 3/16” sizes
- Comprehensive wiring and installation instructions
- Free Holley EFI tuning software for laptop-based advanced tuning
Ideal For:
The Holley EFI Terminator X Max is ideal for enthusiasts and professional tuners who demand precise engine management for Chrysler GEN III HEMI engines without variable valve timing. It suits a wide range of applications including naturally aspirated street cars, mild to heavily boosted builds, and nitrous-equipped race vehicles. Whether you are building a budget-friendly daily driver or a high-performance race car, this EFI controller offers the flexibility, reliability, and advanced features needed to optimize power and drivability.
Holley EFI delivers standalone engine management and EFI systems built for everything from engine swaps to serious horsepower builds. With platforms like Sniper, Terminator X, HP, and Dominator, Holley EFI is aimed at enthusiasts who want modern tuning control, data, and drivability—whether it’s a street car, track car, or full-on race program.
Holley EFI Terminator X Max Gen III HEMI EFI Controller: Chrysler GEN III HEMI (06-12)
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550-1423 Holley EFI 03-15 Chrysler 300 / Dodge Ram 1500 EFI Controller. The Terminator X Max Gen III is a plug-and-play EFI controller designed for Chrysler GEN III HEMI engines with factory drive-by-wire throttle bodies. It offers real-time fuel learning, high impedance injector drivers, and an integrated 1bar MAP sensor. With 4 programmable inputs/outputs, it supports electric fans, boost control, and nitrous systems. The included 3.5" touchscreen handheld and free tuning software simplify calibration and advanced tuning, delivering reliable performance for street or race applications.
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Holley EFI Terminator X Max Gen III HEMI EFI Controller
2006–2012 Chrysler 5.7L / 6.1L / 6.4L GEN III HEMI Engines
550-1423
Overview:
The Holley EFI Terminator X Max Gen III HEMI EFI Controller is a cutting-edge engine management system designed specifically for Chrysler GEN III HEMI engines produced between 2006 and 2012. Compatible with the 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire (DBW) throttle body, this controller delivers precise fuel and ignition control for non-VVT applications. Whether you're upgrading a street machine, building a track-ready race car, or tuning a boosted setup, the Terminator X Max offers a comprehensive, plug-and-play solution that combines advanced features with user-friendly operation.
Equipped with real-time fuel learning and high impedance injector drivers, this EFI controller simplifies tuning and ensures optimal engine performance. The included 3.5-inch touchscreen handheld and Holley’s industry-leading software suite provide both novice and advanced tuners with intuitive tools to quickly dial in their setups and monitor critical engine parameters.
Key Features:
The Terminator X Max EFI Controller is packed with versatile features designed to maximize control and customization for your GEN III HEMI engine:
- Plug-and-play compatibility with 2006–2012 Chrysler 5.7L, 6.1L, and 6.4L GEN III HEMI engines using factory DBW throttle bodies (non-VVT only)
- High impedance injector drivers compatible with Holley EFI and most stock injectors (does not support low impedance injectors)
- Integrated Bosch LSU 4.9 wideband O2 sensors for precise air/fuel ratio monitoring and tuning accuracy
- Built-in 1 bar MAP sensor with the option to disable for external MAP sensor use, ideal for boosted applications
- Four programmable inputs and outputs supporting electric fans, boost control solenoids, nitrous activation, and more
- Advanced boost control options including boost vs. time, gear, RPM, speed, and built-in boost safeties
- Comprehensive nitrous control with channels for wet/dry, progressive or non-progressive operation, and closed-loop AFR targeting
- Multiple advanced tuning tables (1D and 2D) for fuel, spark, and other engine parameters, allowing nearly unlimited configuration
- Onboard diagnostic LEDs for quick status checks including ECU power, engine run, TPS calibration, and cam signal
- Compact ECU design measuring 7.45” x 4.1” x 1.66” for flexible mounting options
- Included EV6 injector harness and vacuum hose adapters (1/8”, 1/4”, and 3/16” sizes) for seamless installation
- Compatible with Holley EFI accessories such as gauges, shift lights, modules, and digital/pro dashes (Holley P/N 553-106, 553-111, 553-112)
Construction & Design:
The Terminator X Max EFI Controller is engineered with durability and compactness in mind. Its rugged enclosure protects sensitive electronics from harsh automotive environments while maintaining a small footprint for versatile mounting locations. The integrated sensors and high-quality Bosch wideband O2 sensors ensure reliable, accurate data acquisition critical for precise engine management. The handheld touchscreen interface is designed for ease of use, featuring a responsive LCD that simplifies calibration and real-time monitoring.
Installation & Fitment:
This EFI controller is designed for straightforward, plug-and-play installation on Chrysler GEN III HEMI engines from 2006 to 2012 equipped with factory Drive-by-Wire throttle bodies (non-VVT). The included EV6 injector harness and vacuum hose adapters facilitate a clean and efficient setup without the need for extensive modifications. The compact ECU size allows for flexible mounting options, but it is important to install the unit with the diagnostic LEDs facing upward for proper operation. The system also supports a wide range of Holley EFI accessories to expand functionality as needed.
What's Included:
- Holley EFI Terminator X Max Gen III HEMI EFI Controller ECU
- 3.5-inch touchscreen handheld controller with calibration wizard and gauge display
- EV6 injector harness compatible with high impedance injectors
- Bosch LSU 4.9 wideband O2 sensors for accurate air/fuel ratio measurement
- Built-in 1 bar MAP sensor with external MAP sensor harness connector
- Vacuum hose adapters in 1/8”, 1/4”, and 3/16” sizes
- Comprehensive wiring and installation instructions
- Free Holley EFI tuning software for laptop-based advanced tuning
Ideal For:
The Holley EFI Terminator X Max is ideal for enthusiasts and professional tuners who demand precise engine management for Chrysler GEN III HEMI engines without variable valve timing. It suits a wide range of applications including naturally aspirated street cars, mild to heavily boosted builds, and nitrous-equipped race vehicles. Whether you are building a budget-friendly daily driver or a high-performance race car, this EFI controller offers the flexibility, reliability, and advanced features needed to optimize power and drivability.
Holley EFI delivers standalone engine management and EFI systems built for everything from engine swaps to serious horsepower builds. With platforms like Sniper, Terminator X, HP, and Dominator, Holley EFI is aimed at enthusiasts who want modern tuning control, data, and drivability—whether it’s a street car, track car, or full-on race program.
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YEARMAKEMODELSUBMODEL2012 - 2014Chrysler3006.4L 3922006 - 2010Chrysler300C6.1L SRT82002 - 2010DodgeRam5.7L Hemi
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Standard shipping
Free Standard Shipping on orders over $300. Select “Free Shipping” at checkout. *Exclusions apply on oversized and freight items.
Free Easy Returns
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.