SKU: 24662864819

Holley EFI Terminator X Max GM Gen V LT Late Direct Injection Kit - 550-1621

Sale price$1484.97 Regular price$1649.97
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Description

Holley EFI Terminator X Max GM Gen V LT Late Direct Injection Kit - 550-1621Overview: Take control of your GM Gen V LT1, L83, or L86 engine with Terminator X! Do not settle for a factory 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, an integrated 1bar MAP sensor, and four programmable inputs and outputs. The inputs and outputs

Overview:

Take control of your GM Gen V LT1, L83, or L86 engine with Terminator X! Do not settle for a factory 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, an integrated 1bar MAP sensor, and four 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 LT 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. All Gen V LT Terminator X kits will come with an external Gasoline Direct Injection Controller, which enables the end user to control and tune, factory injectors, GM Gen V LT Variable Valve Timing (VVT), and factory fuel pumps. 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, an LT swapped budget beater or a boosted racecar, Terminator X has the features and technology you need at a price that will not break the bank! To identify if your engine is an early or late application, refer to your fuel pressure sensor, located behind the intake manifold. Early sensors have a 4-pin connector, whereas late sensors have a 3-pin connector. This will help you pick which kit you require for your engine.

Features:

  • Plug and play GM Gen V LT engine control including GDI and VVT support
  • Ideal for swapping late model GM Gen V LT engines into vintage vehicles
  • 3.5” handheld gets your engine running in no time with a step-by-step calibration wizard
  • GM LS and LT Drive-by Wire Throttle Body Control (Terminator X Max Only)
  • GM 4L60 and 4L80 Transmission Control (Terminator X Max Only)
  • Included engine harness plugs directly into the factory LT DI injector sub harness
  • OEM Injectors supported, with part numbers provided in the handheld wizard, or software
  • Genuine Bosch LSU 4.9 Wideband Control (Will not work with LSU 4.2 Oxygen Sensors)
  • On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal – Cam Signal – VVT Status – Pump Control – and DI Injectors. Allowing you to identify any Critical engine issues at a glance
  • Built in 1bar MAP Sensor, vacuum hose adapters included (1/8th – ¼ and 3/16ths) - or for Boosted applications, you can disable the internal MAP sensor, and utilize an external LT MAP Sensor, the harness comes with the connector terminated, making the inst
  • 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure Inputs are pre-terminated)
  • 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
  • Integrated data logging to the 3.5” Handheld SD Card
  • Free EFI Tuning Software for complete control of your Terminator X power plant

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand Holley EFI
Emission Code 3
Product Type EFI System
Warning California Proposition 65
Shipping Notes
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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]
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SKU: 24662864819

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4.8 ★★★★★
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M
Verified Purchase
Matthew C.
Louisville, US
★★★★★ 5
A whole lotta charger for the price
Color: Phantom Gray
Let’s get this out of the way first: the Anker Prime MagSafe Charger is one of the most expensive, if not the most expensive, 3-in-1 wireless chargers out there. You can find plenty of cheaper options, but as the saying goes, you get what you pay for, and there’s a lot here that justifies the price. The standout feature is Qi 2.2 25W charging. You’ll pay extra for faster charging, but this is one of the few chargers that gives you multiple charging modes (Boost, Ice, and Sleep) depending on your needs. The Ice mode, which keeps your phone cool while charging, is a big deal for long-term battery health, especially if you tend to keep your phone for a few years. The built-in Apple Watch charger supports fast charging, too. My older Belkin 3-in-1 was fine for the first wave of Apple Watches that supported fast charging (Series 7), but slow with my Ultra 2 and 3. I have verified this one charges at 5W, which makes a noticeable difference. It also handles AirPods charging without issue, no slowdowns or inconsistency so far. You can customize settings through the touchscreen, though it’s not very responsive. I recommend downloading the Anker app, pairing it via Bluetooth, and running a firmware update. The app makes adjustments much easier than using the on-device controls. Overall, I’m not sure I’d pay full retail for it, but if you catch it on sale, grab it. It’s a premium charger that feels built to last for years.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 5, 2025
S
Verified Purchase
SemoTech
Natrona Heights, US
★★★★★ 4
Want to love it but for the price it could have been much better
Color: Phantom Gray
This is one of the most expensive chargers I have bought in a long time, but given it comes from Anker, a very reputable and trusted brand with top quality, I bit the bullet and had high expectations. It is a unique design whereby it uses an LCD screen to display the charging wattage in real-time for 3 devices, and also connects via bluetooth to the Anker app for customization and charging data visualization. The design is elegant (would have been even nicer to have different color options for the metal arms) and as unique as the price, while it seems to work really well with the tested Apple Watch Ultra 3 and an iPhone 17 Pro Max plus a case of Apple AirPods. The best feature of the phone charger part is peltier cooling, the latest advancement in optimized wireless charging, which uses a built-in peltier cooling system with a fan and thus prevents the phone from overheating which in turn extends battery life. So given the phone charger is 25W and to assist in the cooling, there is a built-in fan behind the phone charging puck and while not very loud it is audible at night in a very quiet room like a bedroom. If placed on an office desk I am sure you would not hear it. The unit also has a night mode accessible via a touchscreen that stops the fan completely for full silence, but also reduces the charging power and cooling to compensate. The LCD display shows real-time charging power for each device and also has a "screen saver" that shows a clock if so desired with 3 themes. Of course there is Bluetooth as well so the Anker app can be used to remotely see the status of the charger and change some settings but you have to be in Bluetooth range. I knocked off one star for the high $180 price, which I think is excessive, as well as for the fact that the Apple watch charger is limited to 5W. Given the price and that it is a brand new product, Anker should have accounted for the new Apple Watch Ultra 3 models fast charging capabilities, and reviewed Apple's tests with high-power chargers. Anker support is as always outstanding, and overall this is a very high-end and elegant looking charger, but be aware of the nuances mentioned. I am going to keep it for use in my office but not in my bedroom.
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Reviewed in the United States on October 15, 2025
L
Verified Purchase
Linda D. Straw
West Palm Beach, US
★★★★★ 5
Works great and will last
Color: Phantom Gray
A quality product that lives up to its advertising. Sturdily built, heavy enough to stay in place, good looking and very fast charging.
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Reviewed in the United States on April 2, 2026
M
Verified Purchase
Mikke
San Leandro, US
★★★★★ 5
For latest iPhone and Apple Watch together with AirPods Pro 3 must have
Color: Phantom Gray
Honestly this is a piece of hardware that is totally worth the money, one of the kind on the market, nothing like that even exist. Pro: TEC active cooling (really quiet and can go night mode with setup), smart connectivity it actually interacts with your phone for optimize charging and maintenance. Compact design travel friendly. And I don't have to mention that it can do phone, Apple Watch and AirPods. The advertise 25 W charging nominal, tested it showed 38 W with latest iPhone. Against: very pricey, advanced features supported mainly with the latest Apple hardware. Conclusion: if you have the latest iPhone and Apple Watch together with AirPods Pro 3 this is a product for you.
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Reviewed in the United States on March 3, 2026
B
Verified Purchase
bobbyinpa
Los Angeles, US
★★★★★ 5
Best wireless charging stand for Apple products.
Color: Phantom Gray
Connects to phone via Bluetooth, multiple settings can be used with the Anker app that you can download for free. Charges a watch ultra in 20 minutes, charges the iPhone 17 pro max in 35 minutes and charges your pods in 40 minutes. Charger for phone tilts for view and has strong MagSafe. None of my equipment becomes overheated and no issues with charging. Comes with ac plug and long USB C cable.
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Reviewed in the United States on March 5, 2026

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