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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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17

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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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4.2 ★★★★★
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Avelino De Jesus
Waukegan, US
★★★★★ 5
Very good feel soft and there right size
Color: Beige Striped, Size: Queen
They are very nice and soft the matching pillow cases are big so you can put fluffy pillows in it they seam to be durable and the size is perfect they feel really soft to sleep with and they will also keep you warm Over all I recommend these comforter sets
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Reviewed in the United States on December 16, 2025
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Theresa R.
Waukegan, US
★★★★★ 1
Poor quality
Poor design, pre drilled holes did not align. Had to throw it away.
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Reviewed in the United States on September 16, 2025
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Seb
Boise, US
★★★★★ 4
Good
Pretty easy to setup. The directions were easy to follow I setup in less than an hour. It’s kind of flimsy when moving it around but holds up well for sleep. Not squeaky at all.
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Reviewed in the United States on August 29, 2025
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Trevor T.
Boise, US
★★★★★ 3
Wooden slats not sturdy enough.
The bed frame looks nice, but the holes were not all aligned well, and with a bit of wrangling we were able to get it assembled with two people in about 45 minutes. The box was small, and the side rails are actually two pieces. Be careful because I pinched my hand pretty good when trying to align them after everything had been screwed together. The slats that go under the mattress are very thin and I'm concerned that they will break eventually. I think the company could have used better wood for the slats and still charged the same price. It's so hard to read through a ton of reviews to decide which bed frame to buy. This one is OK, but I see myself having to purchase wood in the future to replace the slats. It's long enough for a grown young man of 6'1" to sleep on it, but if my kids were younger and prone to jumping on beds, I'm sure it would break.
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Reviewed in the United States on October 26, 2025
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Samuel Robertson
Houston, US
★★★★★ 1
Stains on the same frames don’t match
I’m quite frustrated with this product. I ordered two natural wood frames for my boys bedroom. The first frame arrived, and it was definitely natural wood. The second frame arrived and it had a yellow stain to it. So I returned it and the company sent me a new frame. Also yellow. So I returned that one and ordered yet another natural wood frame. You guessed it. It arrived with the yellow stain as well. I’m not sure what it’ll take to receive an actual natural wood frame but I sure am frustrated with all of these returns. Meanwhile, only one of my boys has a had a bed frame for the past 18 days. 😣🙄
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Reviewed in the United States on November 19, 2025

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