SKU: 56974527351

EFI Terminator X Stealth GM LS 4150 - Shiny - 24X Crank - 4 Injectors - 650 HP

Sale price$1079.97 Regular price$1199.97
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Ships within 48 hours · Estimated delivery Aug 25 - Aug 30

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Description

EFI Terminator X Stealth GM LS 4150 - Shiny - 24X Crank - 4 Injectors - 650 HPHolley EFI Terminator X Stealth GM LS 4150 Shiny Pre 2009 GM 4L60E 4L80E Transmission Control 1250 HP Overview The Terminator X Stealth 4150 1250HP EFI system from Holley features 8, 100LB HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 1250 HP on forced induction applications. The Terminator X ECU is capable of fuel map self learning and ignition timing control, improving idle stability, drivability, and wide open throttle

Holley EFI Terminator X Stealth GM LS 4150 - Shiny

Pre-2009 GM 4L60E/4L80E Transmission Control - 1250 HP

Overview
The Terminator X Stealth 4150 1250HP EFI system from Holley features 8, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 1250 HP on forced induction applications. The Terminator X ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications? Terminator X Max Stealth 4150 kits provide transmission control for Pre-2009 GM 4L60E/4L80E Transmissions (Part numbers 550-1014, 550-1015, 550-1016)

Not recommended for 4x4 applications with electronic transfer cases. Not compatible with 4L6X transmissions from model year 1995 or before due to year-by-year changes in converter lockup and downshift strategy.

Features:
  • Terminator X Stealth 4150 Kits for either 24x or 58x LS engines
  • Supports up to 650HP with Four 100lb./hr. Injectors
  • Terminator X Max kits provide plug and play Transmission control for GM Transmissions
  • Internal 1bar MAP sensor, built into the Terminator X ECU.
  • All of the wiring exits below the fuel injector bowls, for a completely stealth installation
  • Air entry machined to fit most stock style air cleaners with air cleaner locator provisions
  • External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886
  • Integrated ignition timing control ????????"Plug and play with factory LS coil sub harness and OEM LS coils ????????" no external boxes/modules needed to run Coil Near Plug
  • High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
  • Simple Calibration Wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
  • Self-tuning ECU means you don??????????????t have to be a computer/tuning wiz to have EFI!
  • 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
  • The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
  • OEM Style TPS/IAC, for years of dependable service
  • Available in 3 finishes: Shiny, Black and Gold
  • Compatible with Holley EFI digital dashes, gauges and fuel system accessories


Details:
  • Color: Shiny
  • Ignition Type: GM LS 24x
  • Injector Size: 100 lb/hr @ 58.5 PSI
  • Max Horsepower Rating: 650 Naturally Aspirated
  • Terminator LS Options: Fuel, Spark


Links
Instruction Sheet
Parts Guide
Addendum
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: 56974527351

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Robert
Natrona Heights, US
★★★★★ 5
Excellent quality tire repair kit, works very well.
Excellent quality and reliable tire repair kit, works very well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
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Karyna
Phoenix, US
★★★★★ 5
Amazing product.
This product is great to have around in your car. This makes it easier for solving the problem of a flat tire. I mean! In my case! I rather use this method first instead of having to remove the tire and having to go through the spare tire dilema. For a temporary solution,this kit is perfect. And in some cases! It can serve as a permanent solution. This kit is great to have in your trunk. 👍🏻👍🏻👍🏻
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Reviewed in the United States on October 9, 2025
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Mr. Jumps
New York, US
★★★★★ 5
Gets the job done.
Got 2 flats at the same time in freezing cold weather. Jack failed, but this product didn't.
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Reviewed in the United States on April 11, 2026
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James A Karon
San Leandro, US
★★★★★ 4
Seems fine
The kit looks good to me. Better than my old one that lasted 15 years.
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Reviewed in the United States on May 18, 2026
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Verified Purchase
JCK
Lowell, US
★★★★★ 5
Would buy again
No issues with this product. The oversized T handles make it a bit easier to complete the plugs. Definitely easier for those who have trouble gripping smaller items to work with or for those with larger hands. Valve stem remover was nice quality and nice to have additional valve stems. Would buy again. Wish it had a better case but I can't complain for the price.
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Reviewed in the United States on October 6, 2025

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