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Holley EFI 550-926 Fuel Injection System
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Key item features
- Engine Compatibility: Designed for GM LS1/LS6 engines with 24x crank reluctor, EV1 injectors, and supports 4L60E/4L80E transmissions and drive-by-wire throttle control.
- Tuning Capabilities: Features real-time fuel map learning, a calibration wizard for base tunes, and free EFI tuning software for advanced users.
- Injector Support: Equipped with high impedance injector drivers compatible with most stock LS and Holley EFI injectors, but not low impedance types.
- Sensor Integration: Includes an on-board 1bar MAP sensor for N/A or Nitrous setups, and utilizes a Bosch LSU 4.9 wideband for accurate AFR readings.
- Input/Output Control: Provides 4 programmable inputs (12v, Ground, 5v, Frequency) and 4 outputs (Ground, PWM-) for accessories like fans, boost, and nitrous control.
- Advanced Features: Offers comprehensive boost control (vs. Time, Gear, RPM, Speed) and single-channel nitrous control with progressive or non-progressive options and safeties.
- Diagnostic & Display: Features on-board diagnostic LEDs for critical engine issues and a 3.5" touchscreen handheld for data-logging, gauge display, and calibration.
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Specs
- Compatible carsGM LS1/LS6
- Vehicle makeGM
- Vehicle modelLS1, LS6
- Fuel injection accessory & part typeFuel Injection System
- BrandHOLLEY EFI
- Automotive parts divisionPerformance
Current price is USD$2,099.95
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Columbus, 43215
Arrives by Thu, Feb 12
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Starting from $2,099.95
Compare with similar items
| Product | Viewing this itemHolley EFI 550-926 Fuel Injection System ![]() $2,099.95 current price $2,099.95 | Holley EFI 550-1006 Terminator X Stealth 4150, Gold ![]() $2,249.95 current price $2,249.95 | Holley EFI 550-927 Fuel Injection System ![]() $2,099.95 current price $2,099.95 | Holley EFI 550-920 Terminator X Max 58x/4x EV1 LS MPFI Kit with Transmission Control ![]() $1,899.95 current price $1,899.95 | Holley EFI 550-905T Terminator X 58x/4x EV6 LS MPFI Kit - Without 3.5" Handheld ![]() $1,399.95 current price $1,399.95 | Holley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish ![]() $2,299.95 current price $2,299.95 |
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| Vehicle make | GMHolley EFI 550-926 Fuel Injection System | FordHolley EFI 550-1006 Terminator X Stealth 4150, Gold | GMTerminator® LS MPFI | GMHolley EFI 550-927 Fuel Injection System | GMHolley EFI 550-920 Terminator X Max 58x/4x EV1 LS MPFI Kit with Transmission Control | GMHolley EFI 550-905T Terminator X 58x/4x EV6 LS MPFI Kit - Without 3.5" Handheld | GMHolley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish |
|---|---|---|---|---|---|---|---|
| Vehicle model | LS1Holley EFI 550-926 Fuel Injection System | -Holley EFI 550-1006 Terminator X Stealth 4150, Gold | LS2Terminator® LS MPFI | LS 4.8Holley EFI 550-927 Fuel Injection System | LSHolley EFI 550-920 Terminator X Max 58x/4x EV1 LS MPFI Kit with Transmission Control | LSHolley EFI 550-905T Terminator X 58x/4x EV6 LS MPFI Kit - Without 3.5" Handheld | LSHolley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish |
| Fuel injection accessory & part type | Fuel Injection SystemHolley EFI 550-926 Fuel Injection System | Fuel InjectorsHolley EFI 550-1006 Terminator X Stealth 4150, Gold | EFI Terminator MpfiTerminator® LS MPFI | Fuel Injection SystemHolley EFI 550-927 Fuel Injection System | -Holley EFI 550-920 Terminator X Max 58x/4x EV1 LS MPFI Kit with Transmission Control | PFI KITHolley EFI 550-905T Terminator X 58x/4x EV6 LS MPFI Kit - Without 3.5" Handheld | -Holley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish |
| Automotive parts division | PerformanceHolley EFI 550-926 Fuel Injection System | PerformanceHolley EFI 550-1006 Terminator X Stealth 4150, Gold | PerformanceTerminator® LS MPFI | PerformanceHolley EFI 550-927 Fuel Injection System | PerformanceHolley EFI 550-920 Terminator X Max 58x/4x EV1 LS MPFI Kit with Transmission Control | PerformanceHolley EFI 550-905T Terminator X 58x/4x EV6 LS MPFI Kit - Without 3.5" Handheld | -Holley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish |
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About this item
Product details
GM LS 24x Crank, 1x Cam - LS1/LS6 Engines - with EV1 Injectors - Drive-By-Wire Throttle Body and Transmission Control, No Laptop Required, 3.5 in. Touchscreen Included;
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 550-926 also has 4L60E or 4L80E Transmission control and 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. The 3.5 in. 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!;
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 550-926 also has 4L60E or 4L80E Transmission control and 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. The 3.5 in. 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!;
- For GM LS1/LS6 engines with 24x crank reluctor with EV1 injectors and 4L60E/4L80E transmissions, and drive-by wire throttle body control.
- 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 Max 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.
- MAP Sensor vacuum hose adapters (1/8th â€" Â1/4 and 3/16ths)
- 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
- 4 Outputs â€" Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
- 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
- The included 3.5" Touchscreen Handheld contains a calibration wizard, that allows you to quickly build a base tune for any LS engine. Additionally the handheld provides internal data-logging and a fully customizable gauge display.
- 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: 24x LS Engine Main Harness - EV1 Injector Harness - DBW Throttle Body Harness - 4L60E/4L80E Transmission Control Harness - Terminator X MAX ECU - ECU Main Power Harness - Bosch LSU 4.9 Wideband Oxygen Sensor - Input/Output Harness - and assorted
info:
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Specifications
Compatible cars
GM LS1/LS6
Vehicle make
GM
Vehicle model
LS1, LS6
Fuel injection accessory & part type
Fuel Injection System
Warranty
Warranty information
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Warnings
Warning Text
California Proposition 65
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