SKU: 54263842543

Terminator X Max 24x/1x EV1 LS MPFI w/ Trans Control w/o 3.5 Handheld -550-916T

Sale price$877.48 Regular price$974.98
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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29

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Description

Terminator X Max 24x/1x EV1 LS MPFI w/ Trans Control w/o 3.5 Handheld -550-916TOverview: 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 550-916 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:

  • For GM LS1/LS6 engines with 24x crank reluctor with EV1 injectors and 4L60E/4L80E transmissions
  • 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: 24x 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 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, 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: 54263842543

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G. Dowgird
Bozeman, US
★★★★★ 5
Works like a charm
Color: Silver
Pricey for a towel holder, but a great value for the money. Like everyone else, I’ve tried all types of towel holders that didn’t work or were tricky to replace the rolls. The ear type that have two spring loaded arms to hold the roll, if you pull too hard the roll pops out and the towels go flying. The type that has 2 arms and a rod that goes through the roll. Pain in the #$@ to detach and reattach for roll changes. Slip on type with a post and silicon fins on the post to hold the towels. Not good for jumbo rolls and the other rolls fits on loosely and sometimes a simple tug to detach a towel gets you a handful as it spins away. So I saw this one, hesitated at the price, but based on reviews decided to give it a spin, ( sorry about the pun). It holds the towels firmly thanks to the springy fins attached to the center post. Sized for all rolls, even the jumbo. Stays anchored to the counter with the suction sups. And, dispenses towels with a simple tug with one hand. No need to hold the roll, this baby does what it says. I like the sleek look and the stainless steel finish. As to the cost, if I had bought this one instead of all its failed predecessors, I would have saved money. Buy it, you won’t be sorry
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Reviewed in the United States on January 6, 2024
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HappyWanderer WI
Phoenix, US
★★★★★ 5
No regrets on this choice!
Color: Silver
This holder not only looks good but works like a charm. Very easy to put together & very sturdy. Holds the paper towel with no slipping or popping off and it does not move around on the counter. There are suction cups on the bottom. Very impressed & worth every penny!!
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Reviewed in the United States on August 20, 2025
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Abby McKelvey
Draper, US
★★★★★ 5
Cute!
Color: Gold
Cute and simple. Good quality.
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Reviewed in the United States on May 30, 2026
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Bentleysmom
Lake Worth, US
★★★★★ 5
Sleek and modern
Color: Black, Color: Black
Why did you pick this product vs others?: This holder goes perfect with my decor. It’s very sturdy and makes it easy to tear off one sheet at a time.  I’m so glad this is available as an alternative to those old style under the counter top holders.  Rey modern looking.  Weight: Perfect weight to handle a large roll Build quality: Good quality and sturdy  Paper towel holder: Perfect for all size rolls Size: Hold large rolls Ease of removal: Very easy to tear off sheets of paper towels and to replace the roll Functionality: Easy to use
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Reviewed in the United States on July 2, 2025
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Shaddz
Birmingham, US
★★★★★ 5
Good purchase
Color: Gold, Color: Gold
It matches my decor and it was easy to assemble. I have been using it for the past month and so far it has done what’s it’s supposed to do, look pretty and hold the tissue roll in place. I am sure it will last years.
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Reviewed in the United States on January 27, 2026

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