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Description
EFI Terminator X Max - LS1/LS624x Crank - 1x Cam - EV6 Injectors - Drive-By-Wire Throttle Body Control - USB/CAN Tuning CableHolley EFI Terminator X Max LS1 LS6 24x Crank 1x Cam EV6 Injectors Drive By Wire Throttle Body Control 3. 5 in. Touchscreen Overview 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
Holley EFI Terminator X Max - LS1/LS624x Crank - 1x Cam - EV6 Injectors - Drive-By-Wire Throttle Body Control - 3.5 in. Touchscreen
Overview
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 550-929 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. 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!
Terminator X ECU's are designed to be mounted with the LED's facing up. Designed to work with 6-Pin GM Throttle body P/N's - 12570790, 12580760, 12629992, and 12605109 Designed to work with GM Throttle Pedal P/N - 10379038
Features:
- For GM LS1/LS6 engines with 24x crank reluctor and a Drive-By-Wire Throttle Body, and EV6 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 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 ???? ?? 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
- 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: 24x LS Engine Main Harness - EV6 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.
Details:
- Crank Reluctor: 24x
- Ignition Type: GM LS 24x
- Injector Connector: USCAR (EV6)
- Terminator LS Options: Fuel, Spark, Drive-by-Wire
Links
Instruction Sheet
Instruction Sheet
Parts Guide
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.5 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
Great product, excellent service !!
Great product, excellent service !!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 10, 2025
★★★★★ 5
This stuff works!!
Scent: Fragrance-Free - Standard Size
This set has been the absolute best shampoo, lotion, and ointment for my little one going through a tough spell of baby acne. The ingredient list is clean, and worked miracles quickly.
Baby’s skin was so soft, the redness disappeared within days. After just the second wash I could really notice a difference. Thank you Tubby Todd!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 5
Perfect gentle routine for newborn skin
Scent: Lavender Rosemary - Standard Size, Scent: Lavender Rosemary - Standard Size
We started using the Tubby Todd 3-Step Baby Bath & Skincare set when our baby was just weeks old, and it has been amazing for delicate newborn skin.
The Hair + Body Wash is extremely gentle and doesn’t irritate or dry out the skin. It rinses clean and has a very mild, pleasant scent.
The Everyday Lotion keeps our baby’s skin soft and smooth without feeling heavy or sticky. It’s perfect for daily use after bath time.
The All-Over Ointment is great for extra-dry areas, especially around the cheeks and legs. It creates a protective barrier that helps prevent dryness, especially in cooler weather.
We appreciate that this brand avoids harsh chemicals and focuses on clean, baby-safe ingredients. This routine has become part of our nightly bath time and has kept our newborn’s skin healthy and moisturized.
Would absolutely recommend this to new parents looking for a safe, gentle skincare routine for their baby.
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Reviewed in the United States on January 20, 2026
★★★★★ 5
It didn’t work for my baby
Scent: Fragrance-Free - Standard Size
Update on my review: gave it 5 stars because the customer service is great!!! Thank you uso much! I’m sorry this product didn’t work out for my little one. But thank you for having a great customer service!
I’ve been using the products for about a week now and haven’t noticed any improvement in my baby’s skin. I do appreciate that the ingredients are clean, fragrance-free, and that the ointment is thick and suitable for eczema. However, I’ve seen other reviews mentioning results within a few days, and unfortunately, that hasn’t been my experience. For me, it wasn’t worth the money. At first I thought my baby had ringworm but I took him to his pediatrician and she said it’s a mild eczema, I don’t want to do steroid lotion, I purchased this hoping it would help and it hasn’t
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Before and after baby newborn acne
Scent: Lavender Rosemary - Standard Size, Scent: Lavender Rosemary - Standard Size
As a first-time mom, I was really stressed when my newborn developed baby acne. The doctor told me it’s normal, but it was still hard to see. I tried other products like Nutella, but unfortunately, nothing seemed to help.
Then I decided to try this product — both the face ointment and the body lotion — and I’m so glad I did. My baby actually loves it! Unlike other lotions, it doesn’t feel cold on her skin, so she no longer cries when I apply it.
The biggest difference was how quickly it worked. Within just 2 days, her acne improved so much. I was honestly surprised and relieved.
I definitely recommend this product to other parents. For reference, my baby is Asian, and it worked very well for her skin.
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Reviewed in the United States on May 2, 2026