
Holley 550-917 Terminator X Max EFI GM LS Truck 4.8-6.0L
Holley designed this 550-917 Terminator X Max EFI Engine Management System specifically for GM LS 4.8/5.3/6.0L truck engines with 24x crank reluctor, 4L60E/4L80E transmissions and Multec 2 Injectors. This kit allows complete control of your engine, self-learning fuel strategies as well as the proven, race-winning technology of Holley EFI at a budget-friendly price!
Terminator X Max features 4L60E/4L80E transmission control, real-time fuel learn, high impedance injector drivers, and an integrated 1bar MAP sensor. The 4 programmable inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Comes fully loaded with base maps for common LS engine combinations to get you on the road/track fast!
The 3.5" touch screen LCD handheld contains an easy-to-use calibration wizard as well as tuning and gauge display functions. Also included is Holley EFI's industry-leading, easy-to-use software suite that allows full laptop access for advanced users.
Whether you are building a budget beater or a boosted race car, Terminator X Max has the features and technology you need at a price that won't break the bank!
Main Features:
- For GM LS 4.8/5.3/6.0L truck engines with 24x crank reluctor, 4L60E/4L80E transmissions, and Multec 2 Injectors
- Real-time fuel map learn takes the guess work out of tuning your base fuel table
- High Impedance Injector Drivers will safely power most stock LS injectors and Holley EFI Injectors (will not control Low Impedance Injectors)
- Utilizes Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control
- On-Board 1bar MAP sensor, perfect for N/A or Nitrous engine combos
- MAP Sensor vacuum hose adapters included (1/8th – 1/4 and 3/16ths)
- Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
- Nitrous Control – Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
- Advanced Tables – 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table. These can be used for any custom tables you can dream up, such as Flex Fuel Sensor Offset Table, or a custom fuel or oil pressure safety!
- On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal as well as Cam Signal allow you to identify any critical engine issues at a glance
- Included 3.5" Touchscreen Handheld contains a calibration wizard, allowing you to quickly build a base tune for any LS engine
- Additionally, the handheld provides internal data-logging and a fully customizable gauge display
- In addition, the compact ECU size allows mounting virtually anywhere. Remember, diagnostic LEDS must face up!
- Free EFI Tuning Software for complete control of your Terminator X Max power plant
Holley 550-917 Terminator X Max EFI Kit Additional Features:
- 4 Inputs – 12v, Ground, 5v, and Frequency, for additional pressure sensors, activation triggers for nitrous activation, or trans brake
- 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and more
- Plug-and-Play compatible with multiple Holley EFI accessories such as our gauges, shift lights, various modules, and digital and pro dashes!
- Boost Control: Yes
- Nitrous Control: Yes
- Knock Retard Support: Yes
- Engine Protection: Yes
- CANBUS Support: Yes
- Quantity: Sold as a kit
Emissions:
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles, including:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicles
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!
Original: $1,899.95
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Holley 550-917 Terminator X Max EFI GM LS Truck 4.8-6.0L
Holley designed this 550-917 Terminator X Max EFI Engine Management System specifically for GM LS 4.8/5.3/6.0L truck engines with 24x crank reluctor, 4L60E/4L80E transmissions and Multec 2 Injectors. This kit allows complete control of your engine, self-learning fuel strategies as well as the proven, race-winning technology of Holley EFI at a budget-friendly price!
Terminator X Max features 4L60E/4L80E transmission control, real-time fuel learn, high impedance injector drivers, and an integrated 1bar MAP sensor. The 4 programmable inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Comes fully loaded with base maps for common LS engine combinations to get you on the road/track fast!
The 3.5" touch screen LCD handheld contains an easy-to-use calibration wizard as well as tuning and gauge display functions. Also included is Holley EFI's industry-leading, easy-to-use software suite that allows full laptop access for advanced users.
Whether you are building a budget beater or a boosted race car, Terminator X Max has the features and technology you need at a price that won't break the bank!
Main Features:
- For GM LS 4.8/5.3/6.0L truck engines with 24x crank reluctor, 4L60E/4L80E transmissions, and Multec 2 Injectors
- Real-time fuel map learn takes the guess work out of tuning your base fuel table
- High Impedance Injector Drivers will safely power most stock LS injectors and Holley EFI Injectors (will not control Low Impedance Injectors)
- Utilizes Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control
- On-Board 1bar MAP sensor, perfect for N/A or Nitrous engine combos
- MAP Sensor vacuum hose adapters included (1/8th – 1/4 and 3/16ths)
- Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
- Nitrous Control – Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
- Advanced Tables – 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table. These can be used for any custom tables you can dream up, such as Flex Fuel Sensor Offset Table, or a custom fuel or oil pressure safety!
- On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal as well as Cam Signal allow you to identify any critical engine issues at a glance
- Included 3.5" Touchscreen Handheld contains a calibration wizard, allowing you to quickly build a base tune for any LS engine
- Additionally, the handheld provides internal data-logging and a fully customizable gauge display
- In addition, the compact ECU size allows mounting virtually anywhere. Remember, diagnostic LEDS must face up!
- Free EFI Tuning Software for complete control of your Terminator X Max power plant
Holley 550-917 Terminator X Max EFI Kit Additional Features:
- 4 Inputs – 12v, Ground, 5v, and Frequency, for additional pressure sensors, activation triggers for nitrous activation, or trans brake
- 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and more
- Plug-and-Play compatible with multiple Holley EFI accessories such as our gauges, shift lights, various modules, and digital and pro dashes!
- Boost Control: Yes
- Nitrous Control: Yes
- Knock Retard Support: Yes
- Engine Protection: Yes
- CANBUS Support: Yes
- Quantity: Sold as a kit
Emissions:
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles, including:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicles
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Holley designed this 550-917 Terminator X Max EFI Engine Management System specifically for GM LS 4.8/5.3/6.0L truck engines with 24x crank reluctor, 4L60E/4L80E transmissions and Multec 2 Injectors. This kit allows complete control of your engine, self-learning fuel strategies as well as the proven, race-winning technology of Holley EFI at a budget-friendly price!
Terminator X Max features 4L60E/4L80E transmission control, real-time fuel learn, high impedance injector drivers, and an integrated 1bar MAP sensor. The 4 programmable inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Comes fully loaded with base maps for common LS engine combinations to get you on the road/track fast!
The 3.5" touch screen LCD handheld contains an easy-to-use calibration wizard as well as tuning and gauge display functions. Also included is Holley EFI's industry-leading, easy-to-use software suite that allows full laptop access for advanced users.
Whether you are building a budget beater or a boosted race car, Terminator X Max has the features and technology you need at a price that won't break the bank!
Main Features:
- For GM LS 4.8/5.3/6.0L truck engines with 24x crank reluctor, 4L60E/4L80E transmissions, and Multec 2 Injectors
- Real-time fuel map learn takes the guess work out of tuning your base fuel table
- High Impedance Injector Drivers will safely power most stock LS injectors and Holley EFI Injectors (will not control Low Impedance Injectors)
- Utilizes Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control
- On-Board 1bar MAP sensor, perfect for N/A or Nitrous engine combos
- MAP Sensor vacuum hose adapters included (1/8th – 1/4 and 3/16ths)
- Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
- Nitrous Control – Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
- Advanced Tables – 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table. These can be used for any custom tables you can dream up, such as Flex Fuel Sensor Offset Table, or a custom fuel or oil pressure safety!
- On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal as well as Cam Signal allow you to identify any critical engine issues at a glance
- Included 3.5" Touchscreen Handheld contains a calibration wizard, allowing you to quickly build a base tune for any LS engine
- Additionally, the handheld provides internal data-logging and a fully customizable gauge display
- In addition, the compact ECU size allows mounting virtually anywhere. Remember, diagnostic LEDS must face up!
- Free EFI Tuning Software for complete control of your Terminator X Max power plant
Holley 550-917 Terminator X Max EFI Kit Additional Features:
- 4 Inputs – 12v, Ground, 5v, and Frequency, for additional pressure sensors, activation triggers for nitrous activation, or trans brake
- 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and more
- Plug-and-Play compatible with multiple Holley EFI accessories such as our gauges, shift lights, various modules, and digital and pro dashes!
- Boost Control: Yes
- Nitrous Control: Yes
- Knock Retard Support: Yes
- Engine Protection: Yes
- CANBUS Support: Yes
- Quantity: Sold as a kit
Emissions:
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles, including:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicles
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!











