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Description
EFI Terminator X Max - Gen IV 58x Crank - 4x Cam - EV6 Injectors - Drive-By-Wire Throttle Body Control - USB/CAN Tuning CableHolley EFI Terminator X Max Gen IV 4. 8 5. 3 6. 0 GM Truck Engines and LS2 LS3 58x Crank 4x 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
Holley EFI Terminator X Max - Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS358x Crank - 4x 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 550-931 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. 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 GM Throttle body P/N's - 12570790 and 12580760 Designed to work with GM Throttle Pedal P/N - 10379038
Features:
- 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 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 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 ???? Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
- 4 Inputs ???? 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake
- 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: 58x/4x 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: 58x
- Ignition Type: GM LS 58x
- Injector Connector: USCAR (EV6)
- Terminator LS Options: Fuel, Spark, Drive-by-Wire
Links
Instruction Sheet
Instruction Sheet
Parts Guide
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4.9 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 4
Fun light RomCom
Format: Paperback
Rating: ⭐️⭐️⭐️⭐️ 4/5
Spice rating: 🌶 1.5/5🥵
Read if you like the following tropes:
• Enemies to Lovers
• Brother's best friend
• RomCom
• Forced proximity.
"So tell me exactly what you're wearing"
It has been WAY too long since I've read a RomCom and this was THE perfect book to remind me how much I missed them!
I read this book in one day simply because I could not put it down or stop thinking about it.
"Mr. Wrong number: I texted the wrong number, didn't I?
Me: Yeah, you did :)"
This was such a light, fun, quick read that had me laughing.
"I'd gone from finding her the most annoying girl in the planet to being inexplicably obsessed with her. "
Loved the duel POV and how because the two MC's know each other, you not only got 🔥 banter between Colin and Olivia but also between Mr. Wrong number and Misdial
(2x the 🔥 banter??? SIGN ME UP🙋♀️)
"She was the first thing I thought of when I woke up in the morning, and the last thing before I feel asleep. I would blow off anything to be with her, because everything was brighter when Olivia was around. "
I Loved Olivia's disastrous luck, her passion for writing and live in the moment spirit.
And I Loved the whole plot and texting element to the story .
The one character I couldn't stand was Olivia's mother🙄😡 ugh.
IYKYK
I look forward to reading more from Lynn Painter as I really enjoyed her writing style.
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Reviewed in the United States on April 26, 2023
★★★★★ 3
Disappointing with too much "sturm und drang".
Format: Kindle
I was disappointed after the joy of "Happily Never After". I found both characters unpleasant. I've known people like her who broke everything they touched, and had zero consideration other people's property. She always refused to accept responsibility. It was always "Not my fault", or blaming the victim for the valuable she just destroyed. She's not funny. She's not honest, and she's not appealing. And he is a bit of a door mat, letting his father say the most awful things and not setting him straight and walking away.
It's a pity because the premise is good and frequently hilarious, but she's a walking, talking red flag.
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Reviewed in the United States on January 7, 2026
★★★★★ 5
Mr. Wrong Number & Ms. Miss Dial
Format: Kindle
Lynn Painter has quickly become my go-to rom-com author, and Mr. Wrong Number is pure fun from start to finish. A wrong-number text turns into a flirty, anonymous connection that’s impossible not to love. Olivia is messy and relatable, Colin is slow-burn perfection, and the banter is sharp, swoony, and totally addictive.
If you love texting mishaps, flirty sparks, and romances that feel real, this one’s a must-read. 💕📱
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Reviewed in the United States on January 17, 2026
★★★★★ 4
One sitting read
Format: Kindle
I think I might have a thing for text message chains and love letters.
This book is full of witty, sexy banter. My personal faves.
Colin: What would you do if you accidentally texted the wrong person something naughty, and they responded in a way that surprised you? You were so intrigued that you kept coming back to this faceless number. She's sexy, straightforward, effortlessly funny, and you can't stop thinking about her. And then you realize this mystery woman is none other than your unwanted roommate and best friend's sister. She's a dumpster fire in real life, but what if there was more to it than that?
Olivia: Who hasn't started an apartment complex on fire, lost their job, and forced to move back home and live with their brother and his insufferable best friend? Add in some mismatched socks, and this is a typical Tuesday night for Olivia.
I devoured this book.
I opened it thinking I would read a few chapters and fall asleep. 4 hours later, I finished it. IN.ONE.SITTING.
The bags under my eyes today were worth it
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Reviewed in the United States on February 28, 2024
★★★★★ 5
Excellent Reading
Format: Paperback
Great Book
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026