Holley EFI 550-1062 Terminator X Stealth 4150 58X - Gold Finish

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Management number 254691260 Release Date 2026/11/07 List Price US$959.98 Model Number 254691260
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Compatible with vehicles equipped with GM LS engines with 58x reluctor wheel configuration.;<br><br>The Terminator X Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Terminator X ECU features fuel maps that self-learn and integrated ignition timing control, yielding improved idle stability, drivability, and horsepower at wide-open throttle! 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 kits provide plug and play Transmission control for GM 4L60 and 4L80 Transmissions.;

  • Terminator X Stealth 4150 Kits for 58x LS engines
  • Supports up to 650HP with Four 100lb./hr. Injectors
  • 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
  • Compatible with Holley EFI digital dashes, gauges and fuel system accessories
Compatible cars GM LS engines
Vehicle make GM
Vehicle model LS
Fuel injection accessory & part type Terminator X Stealth 4150 EFI system
Brand Holley EFI
Vehicle fitment type Specific
Items included Bosch LSU 4.9 Wideband Oxygen Sensor
Accessories Four 100lb./hr. Injectors, Genuine Bosch LSU 4.9 Wideband Oxygen Sensor, OEM Style TPS/IAC
Series Terminator X
Model 550-1062
Weight 19.18 lb
Has written warranty No
Vehicle type Car
Volts 12 V
Multipack quantity 1

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