SKU: 3603239867

Terminator X Max 58x/4x EV1 LS MPFI w/ Trans Control w/o 3.5 Handheld -550-920T

Sale price$877.48 Regular price$974.98
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Description

Terminator X Max 58x/4x EV1 LS MPFI w/ Trans Control w/o 3.5 Handheld -550-920TOverview: 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

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 550-918 also has 4L60E or 4L80E Transmission 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" 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!

Features:

  • Designed for GM LS 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam and 4L60E/4L80E transmissions, and 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 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
  • 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
  • Includes: 58x/4x LS Engine Main Harness - EV1 Injector 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 vacuum adapters.

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Holley EFI
Crank Reluctor 58x
Emission Code 3
Ignition Type GM LS 58x
Injector Connector Jetronic / Minitimer (Bosch)
Product Type Terminator X Max LS MPFI
Terminator LS Options Fuel, Spark, Transmission
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 3603239867

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absolutely love my Apple Pencil! ✨ The precision is amazing and it makes writing, drawing, and taking notes feel so smooth and natural. It connects instantly to my iPad and the battery life lasts forever. Definitely one of the best accessories I’ve purchased — it makes everything so much easier and more professional. Highly recommend for students, artists, or anyone who loves being organized! 🍎✏️
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I’m extremely happy with this Apple Pencil! It connected to my iPad quickly and works flawlessly. The writing and drawing experience feels smooth and natural, almost like writing on paper. It’s very responsive with no lag, and the battery life is excellent. Perfect for note-taking, sketching, editing, and everyday productivity. The quality definitely matches the price, and it has made using my iPad so much more convenient. Highly recommend for students, creatives, or anyone wanting to get more out of their iPad.
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I wasn’t sure if this would work as well as the regular iPencil, because I had read this one doesn’t have features the more expensive one has. And I have to say, whatever those extra features are I’m not missing them! This works great, it’s very accurate, amazing quality. Considering how much I’m using it in Procreate, I would say it’s more than paid for itself! As expensive as it seems, it’s been a great value for the money. It’s easy to use and the design is simple. You just have to remember to occasionally plug it in to charge it- the end slides open, revealing a type-C charger port. But the battery life on it lasts a long time. I’ve used it all day before without it dying on me! That reminds me, I should probably go plug it in now…
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Works good
Works great, was easy to connect and it’s easy to use. It’s durable. Most of the time I’m using it instead of my fingers. Pairs well with my iPad A16. It’s not heavy, nor is it too light. Sometimes it’s annoying when I’m trying to use the keyboard on my iPad but it doesn’t pull it up since it’s connected to the pencil, but it’s not too big of a deal. I love the appearance, I’ve always been obsessed with this type of stylus, I found it more practical and easier to use than a traditional stylus. (Plus it makes it so much easier to exit out of ads) I won’t comment on the price since I’m sure it’s worth the money, but I’ll let others be the judge of that. For art purposes, I’m not an artist yet, but I’m practicing, and it works for me, I just can’t comment on how it’ll be for an actual artist though, so please do your research on which will be best for you!
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Reviewed in the United States on April 10, 2026

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