Terminator X Max 58x/4x EV1 LS MPFI w/ Trans Control w/o 3.5 Handheld -550-920T
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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CJFLA
Grantham, US
★★★★★ 4
Good quality item
Size: 8.5"X11"
Good quality product at a good price.
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Thought my Paper was horrible!
Size: 11"X17"
beautiful glossy paper I purchased 110 paper from staples thinking this was going to be thinner when I received it was way thicker then staples paper was totally impressed very cardboard hard like paper, my only down fall is that I have the new inkjet printer from Brother and it never drys overtime I touch the print it comes off on my finger giving my pictures finger print's so I hav to send it back so a wonderful verified user text me and told me that I needed to change my printer to glossy setting again my printer is very new now my Koala glossy paper works amazing so its basically the best glossy paper I have ever seen and used. so I am giving this view my first 5 star rating that I have ever giving for me thats alot! Now I have to re order my paper 11x17 again lol....
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Reviewed in the United States on April 25, 2026
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Nathyn Brendan Masters
San Leandro, US
★★★★★ 5
Great for Indy Comic and Zine Covers
Size: 11"X17"
I use both the 11x17 and 8.5x11 Koala Glossy Inkjet papers as cover stock for Night Phoenix Press mini comics and zines, most often as Kickstarter add-ons or promo items. For that role, they deliver. The gloss finish immediately gives even short-run projects a polished, professional look with the other side having a matte finish which I can flip over for sketch covers using the matte side for the exterior cover. Colors print vibrant, blacks are strong, and the surface takes ink evenly without streaking. The finish looks clean enough to pass for offset printing on both inkjet and laser printers. This paper is also great for comic covers because it can fold down the middle without splitting the gloss coating too much if at all. The 8.5x11.5 works just as well for minis, one-shot zines or inserts. Between the two sizes, I can cover nearly every indie project format I need. They have just enough weight to feel like a true cover while still running smoothly through an inkjet printer. These books are often handled by backers or used as handouts, so durability matters. The stock holds up, though glossy paper can pick up fingerprints or light scuffs if stacked loosely. Bagging finished copies or boxing them quickly solves that. For the cost, it’s a dependable option that makes Kickstarter rewards and promo zines look far more professional than plain paper covers. For creators producing indie comics, add-ons, or zines on a budget, this paper is one of the easiest ways to elevate presentation without driving up printing costs. -Nathyn Brendan Masters
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