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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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Description
Holley Terminator X MAX Engine Management Systems 550-926TERMINATOR X MAX MPFI W TRANS & DBW, LS1 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
TERMINATOR X MAX MPFI W/TRANS & DBW, LS1
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 nitrous 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" 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!
Features:
- 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 – ¼ and 3/16ths)
- 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake
- 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
- 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, 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 –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
Specs
| Brand | Holley EFI |
|---|---|
| Crank Reluctor | 24x |
| Emission Code | 3 |
| Ignition Type | GM LS 24x |
| Injector Connector | Jetronic / Minitimer (Bosch) |
| Product Type | Terminator X Max LS MPFI |
| Terminator LS Options | Fuel, Spark, Drive-by-Wire, Transmission |
| Part Number | 550-926 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 4
Works fairly well! Smells good.
Scent: Sweet Peach & Nectar
This works really good, it has a sweet peach smell to it and lasts for most of the day. After a long day the sweat makes it smell odd to me as my partner doesn't notice a change. Ive only used it after my showers since im afraid it might change the smell if I reapply throughout the day. When i get a new one i will try that and update if it makes me smell decent still after a few uses or if it starts to stink.
It hasn't caused any irritation to my skin.
I do like how easy it is to roll both ways and it doesn't get stuck like most deodorants I've used. Though I dont like how it visibly sticks to my clothes as it takes a bit to dry.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026
★★★★★ 5
LOVE it! Easy to use, pigment is perfect, lasts all day!
Color: Black Brown, Size: 0.01 Ounce (Pack of 2)
I am a victim of early childhood bullying by my brother, who used me for the butt of all his jokes. My eyebrows for one. Always saying they were so think, I looked like the character from the guy from the Muppets Bert or Ernie. Always pointing them out and ridiculing me in front of everyone. I was little and it got worse as I got older, so when I was in grade school, I got tired of it and got ahold of my older sister's Nair hair removal and took them off. Imagine being in fifth grade fat, ugly and no brows, the taunting got even worse, so I had to learn from a young age to draw them in, I went through hell!
Throughout the years, I learned how to draw them in and always used Jordana pencils as they were cheap and perfect. Since they no longer make them anyone, I went on the hunt for a better pencil, and after spending tons of money on eyebrow pencils and seeing how worthless they were, I tried these and OMG, FINALLY, someone got it right. These pencils are perfect, it's a self sharpening mechanical pencil so you don't loose half the pencil when trying to sharpen, It applies perfectly, the coverage is perfect, stays on forever, and removes with ease. One other thing that makes this pencil even more dynamic is the eraser at the end of the pencil, it allows you to shape your brows perfectly!
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Sharp lines that don’t smudge
Color: Black, Size: 0.01 Ounce (Pack of 2)
This eyeliner is very precise and easy to apply, allowing you to create clean, sharp lines without much effort. The waterproof formula holds up well throughout the day without smudging or fading easily. It works well for both subtle everyday looks and more dramatic winged eyeliner styles. The built-in sharpener also helps maintain precision over time. Overall, it’s a dependable eyeliner for long-lasting eye definition.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Good value ! Worth the purchase 😉
Color: Bronze, Size: 0.01 Ounce (Pack of 1)
Love this eye liner , pretty liter brown color . Smooth aplication . Not smudgy at all, ☺️👍Blends nicely .Easy to remove . Always love this brand !
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Reviewed in the United States on May 19, 2026
★★★★★ 4
Revlon colorstay pencil
Color: Sapphire, Size: 0.01 Ounce (Pack of 1)
This liner goes on well and has staying power. I like the color and am happy with this purchase, however… it needs to be sharpened just about every use. I probably won’t order again.
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Reviewed in the United States on May 27, 2026
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