SKU: 38386826248

Terminator X Max 58x/4x EV1 LS MPFI Kit with Transmission Control - 550-920

Sale price$899.98 Regular price$999.98
Save 10%

Pay in installments of $250.00 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 30 - Aug 4

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Terminator X Max 58x/4x EV1 LS MPFI Kit with Transmission Control - 550-920Overview: 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. 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!

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
  • The included 3.5" Touchscreen Handheld contains a calibration wizard, that allows you to quickly build a base tune for any LS engine. Additionally the handheld provides internal data-logging and a fully customizable gauge display.
  • 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: 38386826248

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 8 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
T
Verified Purchase
the revJ
Lexington, US
★★★★★ 5
Wow it's smooth, soft, not overly scented
Scent: Hair Styler (1 Pack)
I rarely try new hair products. I use Aveda sculpting clay and when I tell most stylists this they simply stop trying to sell me their sponsored hair product since they know how good Aveda is. I've never seen a product as smooth as this; it feels like hand lotion and goes in super easy and has a nice hold with really minimal residue. Feels great to put hand through hair after putting this in. This stuff is really different - I'm a fan!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2024
S
Verified Purchase
Stephen H. Gorman
Whiting, US
★★★★★ 5
Huron
Scent: Hair Styler (1 Pack)
Great product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 30, 2025
T
Verified Purchase
Timothy
Phoenix, US
★★★★★ 3
Not bad but read my full review if you are experimenting with different brands
Scent: Hair Styler (1 Pack)
So I am middle of the road on this product. First, I love the products from this brand and use some of their other products quite regularly. I was on a search for an alternative to the Crew Forming Cream (which I have used for maybe 20 years) and decided to purchase this product by Huron as well as the much cheaper medium hold styling cream by Cremo. All three are great products but you will need to decide for yourself how much hold you need as I have discovered that each are quite different and really shouldn't be compared to one another. I will say that if I had to put them all into two categories then Crew is heavy hold and Huron and Cremo is medium / light hold. I must admit that I was skeptical that the cheaper of the three, Cremo, would win me over but it has. For the record it has a very subtle scent (hardly noticable), just enough hold and does not leave you feeling like you have product in your hair. This is similar to Huron as well (although Huron is a very creamy in texture and you can tell its a higher quality product) but at the end of the day all that matters is great hold from a product that is affordable and does not leave a sticky texture in your hair. Cremo wins hands down. As for Crew, well it was a good ride but too expensive and way too heavy...time to move on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2025
C
Verified Purchase
coronad0
Phoenix, US
★★★★★ 5
So lightweight. Perfect for extra thick hair.
Scent: Hair Styler (1 Pack)
Its almost mousse like in how light weight it is and smells fantastic. I wanted something just above light weight hold and not weigh my thick hair down and this does a great job. A little pricey but SO much better than the usual store brands out there. And my wife is totally in love with how great it smells when I put it on, so bonus!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2024
J
Verified Purchase
Jason Kearns
Chelsea, US
★★★★★ 5
Smells good and doesn’t feel greasy
Scent: Hair Styler (1 Pack)
Product didn’t leave a greasy feeling to the hands or the hair. Kept hold all day for my hair style but I knew it was light hold going in. It has a great scent
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 15, 2024

recommand products