SKU: 58267931037

Terminator X 58x/4x EV1 LS MPFI Kit - 550-910

Sale price$719.98 Regular price$799.98
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Ships within 48 hours · Estimated delivery Jul 25 - Jul 30

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Description

Terminator X 58x/4x EV1 LS MPFI Kit - 550-910Overview: Take control of your LS engine with Terminator X! 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 features real time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The inputs and

Overview:

Take control of your LS engine with Terminator X! 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 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. Terminator X 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 has the features and technology you need at a price that won't break the bank!

Features:

  • Designed for GM LS Engines with 58x Crank, 4x Cam - 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 systems utilize the Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control.
  • 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
  • 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
  • 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!adjustable through included 3.5” f
  • 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 - Terminator X 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 LS MPFI
Terminator LS Options Fuel, Spark
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: 58267931037

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4.6 ★★★★★
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Verified Purchase
Joyce Snyder
Draper, US
★★★★★ 5
It stays put on the counter
Color: Silver
this is a great counter dispenser for paper towels, and it looks good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
G
Verified Purchase
G. Dowgird
Port Orchard, 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
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 6, 2024
H
Verified Purchase
HappyWanderer WI
Grantham, 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
A
Verified Purchase
Amy
Lowell, US
★★★★★ 5
Great product! :)
Color: 01-silver
It looks great and work very smoothly on our kitchen counter.
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Reviewed in the United States on May 30, 2026
T
Verified Purchase
Thomas J Standeven
Massapequa, US
★★★★★ 5
Very fuctional
Color: 01-silver
Very stylish and functional, the suction cups hold it in place
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026

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