Holley EFI Terminator X Max Gen III HEMI EFI Controller
2003–2013+ Chrysler GEN III HEMI 5.7L / 6.1L / 6.4L Engines (Non-VVT, Drive-by-Wire)
550-1425
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 from 2003 through 2013 and beyond. Compatible with 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire throttle body (non-VVT only), this controller offers a plug-and-play solution that simplifies tuning and maximizes engine performance.
Whether you are building a street-driven muscle car, a weekend track warrior, or a boosted race vehicle, the Terminator X Max provides advanced features such as real-time fuel learning, multiple programmable inputs and outputs, and comprehensive boost and nitrous control. Its intuitive 3.5” touchscreen handheld and included Holley EFI software make setup and tuning accessible for both beginners and experienced tuners alike.
Key Features:
The Terminator X Max EFI Controller is packed with versatile features engineered to enhance control and customization for your GEN III HEMI engine:
- Plug-and-play compatibility with 2003–2013+ Chrysler GEN III HEMI 5.7L, 6.1L, and 6.4L engines using factory Drive-by-Wire throttle bodies (non-VVT only)
- High impedance injector drivers supporting Holley EFI and most stock injectors (does not support low impedance injectors)
- Integrated 1 bar MAP sensor with option to disable for external MAP sensor use, ideal for boosted applications
- Four programmable inputs and outputs for electric fans, boost control solenoids, progressive nitrous systems, and more
- Advanced boost control options including boost vs. time, gear, RPM, speed, and built-in boost safeties
- Nitrous control channels supporting wet or dry, progressive or non-progressive operation with rich/lean safeties and closed-loop AFR targeting
- Comprehensive tuning tables: four 1D tables, one 1D gear table, four 2D tables, and one 2D gear table for flexible calibration
- Included Bosch LSU 4.9 wideband O2 sensors for precise air/fuel ratio monitoring and tuning accuracy
- 3.5” touchscreen handheld with calibration wizard, data logging, and customizable gauge displays
- Compact ECU design measuring just 7.45” x 4.1” x 1.66” for versatile mounting options
- Free Holley EFI tuning software for full laptop access and advanced tuning capabilities
Construction & Design:
The Terminator X Max EFI Controller is engineered with durability and compactness in mind. Its rugged housing protects sensitive electronics while allowing for flexible installation in tight engine bays. The included EV6 (USCAR) injector harness ensures seamless integration with factory wiring, and vacuum hose adapters in multiple sizes (1/8”, 1/4”, and 3/16”) facilitate straightforward sensor connections. Holley’s attention to detail extends to onboard diagnostic LEDs that provide instant visual feedback on critical engine parameters such as ECU power, engine run status, TPS calibration, and cam signal integrity.
Installation & Fitment:
Installation is straightforward with the Terminator X Max’s plug-and-play design tailored for Chrysler GEN III HEMI engines from 2003 to 2013+. The system supports factory Drive-by-Wire throttle bodies and includes all necessary wiring harnesses and adapters for a clean, professional setup. No major modifications are required, making it an ideal upgrade for enthusiasts seeking enhanced engine control without extensive rewiring or fabrication. The compact ECU size allows for flexible mounting locations, but it is important to orient the diagnostic LEDs facing upward for proper visibility.
What's Included:
- Terminator X Max EFI Controller ECU
- 3.5” touchscreen handheld controller with calibration wizard
- EV6 (USCAR) injector harness
- Bosch LSU 4.9 wideband O2 sensors
- Vacuum hose adapters (1/8”, 1/4”, and 3/16” sizes)
- Terminated connector for external MAP sensor installation
- Free Holley EFI tuning software for laptop
- Comprehensive instructions and injector support chart
Ideal For:
The Holley EFI Terminator X Max is perfect for enthusiasts and professional tuners alike who want a reliable, feature-rich EFI controller for their GEN III HEMI-powered vehicles. It suits a wide range of builds, from naturally aspirated street machines to boosted race cars and nitrous-injected setups. Its ease of use combined with advanced tuning capabilities makes it an excellent choice for those upgrading from factory engine management or building a custom EFI system on a budget.
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 / Dodge Ram GEN III HEMI (03-13+)
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550-1425 Holley EFI 03-15 Chrysler 300 / 03-10 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. Multiple programmable inputs/outputs support fans, boost control, and nitrous. The included 3.5” touchscreen handheld and free tuning software simplify setup and calibration, delivering precise control and enhanced performance for both street and race applications.
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Holley EFI Terminator X Max Gen III HEMI EFI Controller
2003–2013+ Chrysler GEN III HEMI 5.7L / 6.1L / 6.4L Engines (Non-VVT, Drive-by-Wire)
550-1425
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 from 2003 through 2013 and beyond. Compatible with 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire throttle body (non-VVT only), this controller offers a plug-and-play solution that simplifies tuning and maximizes engine performance.
Whether you are building a street-driven muscle car, a weekend track warrior, or a boosted race vehicle, the Terminator X Max provides advanced features such as real-time fuel learning, multiple programmable inputs and outputs, and comprehensive boost and nitrous control. Its intuitive 3.5” touchscreen handheld and included Holley EFI software make setup and tuning accessible for both beginners and experienced tuners alike.
Key Features:
The Terminator X Max EFI Controller is packed with versatile features engineered to enhance control and customization for your GEN III HEMI engine:
- Plug-and-play compatibility with 2003–2013+ Chrysler GEN III HEMI 5.7L, 6.1L, and 6.4L engines using factory Drive-by-Wire throttle bodies (non-VVT only)
- High impedance injector drivers supporting Holley EFI and most stock injectors (does not support low impedance injectors)
- Integrated 1 bar MAP sensor with option to disable for external MAP sensor use, ideal for boosted applications
- Four programmable inputs and outputs for electric fans, boost control solenoids, progressive nitrous systems, and more
- Advanced boost control options including boost vs. time, gear, RPM, speed, and built-in boost safeties
- Nitrous control channels supporting wet or dry, progressive or non-progressive operation with rich/lean safeties and closed-loop AFR targeting
- Comprehensive tuning tables: four 1D tables, one 1D gear table, four 2D tables, and one 2D gear table for flexible calibration
- Included Bosch LSU 4.9 wideband O2 sensors for precise air/fuel ratio monitoring and tuning accuracy
- 3.5” touchscreen handheld with calibration wizard, data logging, and customizable gauge displays
- Compact ECU design measuring just 7.45” x 4.1” x 1.66” for versatile mounting options
- Free Holley EFI tuning software for full laptop access and advanced tuning capabilities
Construction & Design:
The Terminator X Max EFI Controller is engineered with durability and compactness in mind. Its rugged housing protects sensitive electronics while allowing for flexible installation in tight engine bays. The included EV6 (USCAR) injector harness ensures seamless integration with factory wiring, and vacuum hose adapters in multiple sizes (1/8”, 1/4”, and 3/16”) facilitate straightforward sensor connections. Holley’s attention to detail extends to onboard diagnostic LEDs that provide instant visual feedback on critical engine parameters such as ECU power, engine run status, TPS calibration, and cam signal integrity.
Installation & Fitment:
Installation is straightforward with the Terminator X Max’s plug-and-play design tailored for Chrysler GEN III HEMI engines from 2003 to 2013+. The system supports factory Drive-by-Wire throttle bodies and includes all necessary wiring harnesses and adapters for a clean, professional setup. No major modifications are required, making it an ideal upgrade for enthusiasts seeking enhanced engine control without extensive rewiring or fabrication. The compact ECU size allows for flexible mounting locations, but it is important to orient the diagnostic LEDs facing upward for proper visibility.
What's Included:
- Terminator X Max EFI Controller ECU
- 3.5” touchscreen handheld controller with calibration wizard
- EV6 (USCAR) injector harness
- Bosch LSU 4.9 wideband O2 sensors
- Vacuum hose adapters (1/8”, 1/4”, and 3/16” sizes)
- Terminated connector for external MAP sensor installation
- Free Holley EFI tuning software for laptop
- Comprehensive instructions and injector support chart
Ideal For:
The Holley EFI Terminator X Max is perfect for enthusiasts and professional tuners alike who want a reliable, feature-rich EFI controller for their GEN III HEMI-powered vehicles. It suits a wide range of builds, from naturally aspirated street machines to boosted race cars and nitrous-injected setups. Its ease of use combined with advanced tuning capabilities makes it an excellent choice for those upgrading from factory engine management or building a custom EFI system on a budget.
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.