Terminator X Max 58x/4x EV1 LS MPFI Kit with DBW Throttle Body Control - 550-933
SKU: 44874723040

Terminator X Max 58x/4x EV1 LS MPFI Kit with DBW Throttle Body Control - 550-933

Sale price$899.98 Regular price$999.98
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Description

Terminator X Max 58x/4x EV1 LS MPFI Kit with DBW Throttle Body Control - 550-933Overview: 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 550-931 also has Drive-By Wire Throttle Body 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 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam and a Drive-By-Wire Throttle Body, with 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.
  • 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.
  • 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
  • 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake
  • 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
  • Recommended Pedal part number - 10379038
  • Includes: 58x/4x LS Engine Main Harness - EV1 Injector Harness - DBW Throttle Body 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, Drive-by-Wire
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: 44874723040

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Amazon Customer
Phoenix, US
★★★★★ 5
Keeps phone cool off phone charging pads!
I bought this magnetic phone mount for my Tesla Model X and it works great. The magnet is extremely strong and holds my phone securely, even over bumps and rough roads. Once it’s attached, the phone doesn’t move at all. Installation was quick and easy, and it fits the Model X interior nicely without looking out of place. It keeps the phone in a convenient spot for navigation or music without blocking the main screen. Overall, it’s a solid, well-made mount that does exactly what it’s supposed to do. If you have a Model X and want a strong magnetic phone mount, this is a great buy.
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Reviewed in the United States on January 11, 2026
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rania
Carnegie, US
★★★★★ 5
Super Strong Magnet & Perfect Fit for My Tesla
I’m really happy with this Tesla phone mount. The magnet is extremely strong—my phone stays in place even when I’m driving on bumpy roads. Installation was quick and easy, and it attaches securely without blocking the screen or getting in the way. I love how clean and minimal it looks in the car. The rotation is smooth, and it makes it easy to check maps or take calls hands-free. If you want a reliable and sturdy phone mount that matches the Tesla interior, this one is perfect. Highly recommend!
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Reviewed in the United States on November 27, 2025
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Miguel Frias
Whiting, US
★★★★★ 4
Good quality, outstanding customer service
The mount is stylish; it looks great in a Tesla. The quality is good. However, the 2025 version broke after 1 year of use, which they fixed in 2026. The customer service is great!
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Reviewed in the United States on May 21, 2026
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Luke Kathman
Carnegie, US
★★★★★ 5
10/10
I picked up the Tesla Phone Mount MagSafe Car Mount for my car, and it’s been fantastic. The magnetic strength is impressive — even on bumpy roads my phone stays firmly in place without shifting or slipping. This mount works smoothly with my iPhone (MagSafe cases snap right on), and it’s also easy to use with other phones when I switch drivers. Installation was quick and simple — just stick it where you want it and you’re ready. The mount holds the phone at a great viewing angle for navigation and calls, and I love being able to pop the phone on and off with one hand. The magnets feel strong enough that I don’t worry about the phone falling even during quick turns. Overall, this MagSafe mount has been reliable, secure, and convenient — a great upgrade for everyday driving.
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Reviewed in the United States on February 3, 2026
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Weekend Warrior
Charlottesville, US
★★★★★ 3
Good Mount / Poorly Connected Magnet
Good product. It fits well on my Model Y screen. It worked fine for 3 months. but then the magnet became loose from the ring. I like the product so instead of discarding it thought of using glue to stick the magnet back to the ring. BUT it didn’t work. So now it has been a frustrating experience. I may choose to discard a product that has a strong mount, but the one important part (magnet) not working correctly.
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Reviewed in the United States on April 5, 2026

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