SKU: 36980542895

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

Sale price$719.98 Regular price$799.98
Save 10%

Pay in installments of $200.00 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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: 36980542895

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.2 ★★★★★
Based on 17 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
F
Verified Purchase
Frank R.
Lake Worth, US
★★★★★ 4
Not bad for the money
Color: Blue, Size: X-Large
Not bad for the money, BUT, not high quality fabric (KINDA wrinkles easily, but Ironed nicely.. Stitching was decent.. Only washed one time (inside out and in cold), so it's kinda early to fully rate, but I will not over -wash it...For a musician, it's kinda nice ...Might buy a couple more for the stage👍
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 23, 2025
A
Verified Purchase
Aleya Signor
Chelsea, US
★★★★★ 5
Sexy Shirt!
Color: White, Size: Large
My husband loves it. He says it’s soft and very comfortable. Flexible with his body but not tight at all. He’s a size large, 180# with welding pipes! He’s a welder by trade so his biceps are decent, this shirt doesn’t strangle them. He looks amazing in it and it wears well and comfortably under a suit or sports jacket. True to size and color.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 16, 2026
C
Verified Purchase
Celticsgyrl34
New York, US
★★★★★ 5
5/5 Stars
Color: 01-black, Size: Large, Color: 01-black, Size: Large
I absolutely love this black cowboy shirt! The first time I put it on, I could feel the quality. The material is comfortable but sturdy, and the embroidery on the front and sleeves is just beautiful. It gives that true Western vibe while still looking classy and modern. What I really like most is the fit — it’s sharp and clean but still gives me room to move and stay comfortable. I paired it with my boots and belt, and the whole outfit came together perfectly. I’ve gotten so many compliments wearing this shirt, and it definitely makes me feel confident and put together. Whether I’m dressing up for an event or just want to rock a casual cowboy look, this shirt never misses. It’s definitely one of my favorite pieces in my closet now!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 7, 2025
A
Verified Purchase
Amazolia
Lexington, US
★★★★★ 3
Too loose
Color: Black (Retro Rose), Size: Small
I really like this shirt, but unfortunately it is way too loose for a size S. It looks like a XL. A shirt like that should be tight.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
I
Verified Purchase
I bought these on Sept 23rd and they fell apart on me already not even 45 days. Won’t be buying any Lugz shoes again
Whiting, US
★★★★★ 5
Excellent choice
Love this shirt looked better in person then on the picture fit perfectly and true to size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026

recommand products