Holley EFI Terminator X Max GM Gen V LT Late Direct Injection Kit - 550-1631
SKU: 12543723708

Holley EFI Terminator X Max GM Gen V LT Late Direct Injection Kit - 550-1631

Sale price$1597.47 Regular price$1774.97
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Description

Holley EFI Terminator X Max GM Gen V LT Late Direct Injection Kit - 550-1631Overview: 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
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • 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: 12543723708

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Trevor Barton
Los Angeles, US
★★★★★ 2
Ehh
Pills up rather quickly
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Reviewed in the United States on June 7, 2026
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Dorothy Gilbertson
San Leandro, US
★★★★★ 3
Nice but dissapointing
So it sometimes stays cool but if it’s under a blanket and you have your body on it at all it will get warm but the spots you don’t use will get cool sometimes. I am very disappointed in the material though because it’s like my dry skin scratched the pillow case all over which makes me question it and I don’t think I would buy again.
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Reviewed in the United States on December 15, 2025
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J. Germello
Lowell, US
★★★★★ 5
Cooling fabric is Just what I needed
Color: 03-black, Size: 20" X 26" (Pack of 4)
I'm a hot sleeper. These cooling pillow cases are fantastic. It has ended soaked pillow cases. I paired these with waterproof pillow cases for extra pillow protection. I now sleep cooler and wake up dry. I also toss and turn less and wake up less frequently hot, sweaty and uncomfortable and I can sleep though the night. I don't need to flip my pillows over because of sweat. Both sides of these pillow cases have arc chill cooling fabric. They're soft, silky, breathable and comfortable to lay my head on. The colors to choose from is a wide selection. These look great on my king size bed. I love this fabric so much that I upgraded all of my pillows and blanket sheets to cooling fabric. I'm sold on these. The zipper is premium, sturdy and durable. My pillows fit perfectly on these cases. The cooling material is top notch high quality to me with great craftsmanship. I liked these ones so much that I bought more and plan to again. My partner seen and felt these and immediately went online to buy some blankets to go with the pillow cases I gifted. I also bought my son these and a few cooling blankets. These work best with a fan or air conditioner. Highly recommended and you won't regret this purchase if you're a hot sleeper to profusely sweating during sleep.
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Reviewed in the United States on May 10, 2026
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Dawn H
Omaha, US
★★★★★ 5
Cool and comfy!
Color: 01-grey, Size: 20" X 26" (Pack of 2)
Very comfy and cooling. Great for hot sleepers!
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Reviewed in the United States on June 3, 2026
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Draper, US
★★★★★ 5
keeps pillow secured and cool
Color: 05-purple, Size: 20" X 26" (Pack of 4)
just what I was looking for. A cooling pillow case with a zipper! my regular pillow cases slipped off my pillows So annoying. Now my pillows are staying put zipped in. so soft and cool. no more wrestling with the pillow case while trying to flip my pillow over trying to find a cool spot.
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Reviewed in the United States on May 7, 2026

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