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Holley EFI 550-933T Terminator X Max MPFI System
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Key item features
- Engine Compatibility: Designed for GM 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam, and Drive-By-Wire throttle bodies, supporting EV1 injectors.
- Tuning Capabilities: Features real-time fuel map learning, high impedance injector drivers, and utilizes a Bosch LSU 4.9 wideband for accurate AFR readings.
- Integrated Sensors: Includes an on-board 1bar MAP sensor suitable for N/A or Nitrous setups, with options for external 2+Bar sensors.
- Programmable I/O: Equipped with 4 ground/PWM outputs for accessories like fans and boost control, and 4 12v/ground/5v/frequency inputs for additional sensors or triggers.
- Advanced Controls: Offers comprehensive boost control (vs. time, gear, RPM, speed) and single-channel nitrous control with progressive options and safety features.
- Diagnostic & Software: Features on-board diagnostic LEDs for critical engine issues and includes a CAN/USB tuning cable with free EFI tuning software for full control.
- Compact Design: The ECU's compact size allows for versatile mounting, and it's plug-and-play compatible with various Holley EFI accessories.
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Specs
- Vehicle makeChevy
- Vehicle model4.8, 5.3, 6.0 LS Truck Engines
- BrandHOLLEY EFI
- Automotive parts divisionPerformance
- Vehicle fitment typeSpecific
- FeaturesEasy To Use
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| Product | Viewing this itemHolley EFI 550-933T Terminator X Max MPFI System ![]() Now $1,663.95 current price Now $1,663.95, Was $1,789.95$1,789.95 | Holley EFI 550-932T Terminator X Max 24x/1x EV6 LS MPFI Kit with DBW Throttle Body Control - Without 3.5" Handheld ![]() Now $1,663.95 current price Now $1,663.95, Was $1,789.95$1,789.95 | Terminator X MPFI System ![]() $1,348.95 current price $1,348.9535 out of 5 Stars. 3 reviews | Holley EFI 550-931T Terminator X Max MPFI System ![]() Now $1,663.95 current price Now $1,663.95, Was $1,849.95$1,849.95 | Terminator X Max MPFI System ![]() $1,708.95 current price $1,708.9515 out of 5 Stars. 1 reviews | Holley EFI 550-931 Fuel Injection System ![]() $1,708.95 current price $1,708.95 | Holley EFI 550-919T Terminator X Max 24x/1x EV6 LS MPFI Kit with Transmission Control - Without 3.5" Handheld ![]() $1,663.95 current price $1,663.95 | Holley EFI 550-943 Terminator X Max Ford MPFI Kit w/ Transmission Control ![]() $1,708.95 current price $1,708.95 | Holley EFI 550-1223 Terminator X HEMI Gen III 2003-2006 Kit ![]() Now $1,753.95 current price Now $1,753.95, Was $1,899.95$1,899.95 | Holley EFI 550-1222 Terminator X HEMI Gen III 2003-2006 Kit ![]() $1,695.95 current price $1,695.95 |
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| Vehicle make | ChevyHolley EFI 550-933T Terminator X Max MPFI System | GMHolley EFI 550-932T Terminator X Max 24x/1x EV6 LS MPFI Kit with DBW Throttle Body Control - Without 3.5" Handheld | GMTerminator X MPFI System | ChevyHolley EFI 550-931T Terminator X Max MPFI System | ChevyTerminator X Max MPFI System | GMHolley EFI 550-931 Fuel Injection System | GMHolley EFI 550-919T Terminator X Max 24x/1x EV6 LS MPFI Kit with Transmission Control - Without 3.5" Handheld | FordHolley EFI 550-943 Terminator X Max Ford MPFI Kit w/ Transmission Control | ChryslerHolley EFI 550-1223 Terminator X HEMI Gen III 2003-2006 Kit | ChryslerHolley EFI 550-1222 Terminator X HEMI Gen III 2003-2006 Kit |
|---|---|---|---|---|---|---|---|---|---|---|
| Vehicle model | 4.8Holley EFI 550-933T Terminator X Max MPFI System | LS1Holley EFI 550-932T Terminator X Max 24x/1x EV6 LS MPFI Kit with DBW Throttle Body Control - Without 3.5" Handheld | LS1Terminator X MPFI System | 4.8Holley EFI 550-931T Terminator X Max MPFI System | LS1Terminator X Max MPFI System | 4.8Holley EFI 550-931 Fuel Injection System | LS1Holley EFI 550-919T Terminator X Max 24x/1x EV6 LS MPFI Kit with Transmission Control - Without 3.5" Handheld | -Holley EFI 550-943 Terminator X Max Ford MPFI Kit w/ Transmission Control | GEN III HEMIHolley EFI 550-1223 Terminator X HEMI Gen III 2003-2006 Kit | GEN III HEMIHolley EFI 550-1222 Terminator X HEMI Gen III 2003-2006 Kit |
| Automotive parts division | PerformanceHolley EFI 550-933T Terminator X Max MPFI System | PerformanceHolley EFI 550-932T Terminator X Max 24x/1x EV6 LS MPFI Kit with DBW Throttle Body Control - Without 3.5" Handheld | PerformanceTerminator X MPFI System | PerformanceHolley EFI 550-931T Terminator X Max MPFI System | PerformanceTerminator X Max MPFI System | PerformanceHolley EFI 550-931 Fuel Injection System | PerformanceHolley EFI 550-919T Terminator X Max 24x/1x EV6 LS MPFI Kit with Transmission Control - Without 3.5" Handheld | PerformanceHolley EFI 550-943 Terminator X Max Ford MPFI Kit w/ Transmission Control | PerformanceHolley EFI 550-1223 Terminator X HEMI Gen III 2003-2006 Kit | PerformanceHolley EFI 550-1222 Terminator X HEMI Gen III 2003-2006 Kit |
| Vehicle fitment type | SpecificHolley EFI 550-933T Terminator X Max MPFI System | SpecificHolley EFI 550-932T Terminator X Max 24x/1x EV6 LS MPFI Kit with DBW Throttle Body Control - Without 3.5" Handheld | SpecificTerminator X MPFI System | UniversalHolley EFI 550-931T Terminator X Max MPFI System | UniversalTerminator X Max MPFI System | SpecificHolley EFI 550-931 Fuel Injection System | SpecificHolley EFI 550-919T Terminator X Max 24x/1x EV6 LS MPFI Kit with Transmission Control - Without 3.5" Handheld | SpecificHolley EFI 550-943 Terminator X Max Ford MPFI Kit w/ Transmission Control | SpecificHolley EFI 550-1223 Terminator X HEMI Gen III 2003-2006 Kit | SpecificHolley EFI 550-1222 Terminator X HEMI Gen III 2003-2006 Kit |
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Product details
GM LS 58x Crank, 4x Cam - 4.8/5.3/6.0 Truck Engines- EV1 Injectors - Drive-By-Wire Throttle Body Control, USB/CAN Tuning Cable;
Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at a budget-friendly price!
Terminator X Max features real-time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive NOS control, and much more. Part number 550-931 also has Drive-By Wire Throttle Body control. Terminator X Max comes fully loaded with base maps for common LS engine combinations to get you out of the garage and on the road/track fast. These Terminator X kits include a USB/CAN tuning cable instead of the 3.5 in. Handheld LCD, these kits require the use of the free Terminator X Software for initial setup. The Terminator X Software includes multiple base calibrations to choose from for either naturally aspirated or boosted engines.
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!;
Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at a budget-friendly price!
Terminator X Max features real-time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive NOS control, and much more. Part number 550-931 also has Drive-By Wire Throttle Body control. Terminator X Max comes fully loaded with base maps for common LS engine combinations to get you out of the garage and on the road/track fast. These Terminator X kits include a USB/CAN tuning cable instead of the 3.5 in. Handheld LCD, these kits require the use of the free Terminator X Software for initial setup. The Terminator X Software includes multiple base calibrations to choose from for either naturally aspirated or boosted engines.
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!;
- Designed for GM 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam and a Drive-By-Wire Throttle Body, with EV1 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. Injector support chart provided in the instructions (Will not control Low Impedance Injectors)
- All of the new Terminator X systems utilize the Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control.
- On-Board 1bar MAP sensor, is perfect for N/A or Nitrous engine combos. If your combination requires a 2+Bar, we recommend GM 12592525, and our adapter part number 558-416.
- 4 Outputs â€" Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
- 4 Inputs â€" 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake
- Boost Control â€" Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
- Nitrous Control â€" Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
- Advanced Tables â€" 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table, 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 â€" Engine Run â€" Wideband Status â€" TPS Calibration â€" Crank Signal â€"Cam Signal. Allow you to identify any Critical engine issues at a glance
- Includes CAN/USB tuning cable allowing you to configure your ECU and Tuning the engine in real time.
- The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDS must face up!
- Plug and play compatible with more Holley EFI accessories such as; analog style gauges, shift lights, various modules, and coming soon, 12.3" digital dash support!
- Free EFI Tuning Software for complete control of your Terminator X power plant
- Recommended Pedal part number - 10379038
- Includes: 58x/4x LS Engine Main Harness - EV1 Injector Harness - DBW Throttle Body Harness - Terminator X MAX ECU - ECU Main Power Harness - Bosch LSU 4.9 Wideband Oxygen Sensor - Input/Output Harness - and assorted vacuum adapters.
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Specifications
Compatible cars
GM LS 58x Crank, 4x Cam - 4.8/5.3/6.0 Truck Engines- EV1 Injectors - Drive-By-Wire Throttle Body Control
Vehicle make
Chevy
Vehicle model
4.8, 5.3, 6.0 LS Truck Engines
Fuel injection accessory & part type
Terminator X Max MPFI System
Warnings
Warning Text
California Proposition 65
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