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Holley EFI Terminator X MAX Stealth 4150 58X LS (Max 600HP forced Induction support)




Collections: Holley EFI

Product type:

Vendor: Alpha Motorsports, Inc.




Don't settle for less, maintain control of your transmission with race winning technology! This Alpha approved high quality kit will surely take you to the next level at a budget friendly price.

This kit features 4, 100Lb/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated and 600HP on Forced induction applications. The Terminator X fuel maps that self-learn and integrated ignition timing control, improves idle stability, drivability and provides wide -open throttle horsepower! The Terminator X MAX Stealth 4150 kit provides transmission control on pre-2009 GM 4L60 and 4L80 Transmissions.

The Stealth 4150 kits include transmission knock down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications. 


  • Terminator X Stealth 4150 Kits for either 24x or 58x LS GM 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.