Terminator X STEALTH 4500 550-1071

EFI System



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The Terminator X Stealth 4500 EFI system from Holley features 8, 100LB/HR Fuel Injectors capable of supporting up to 1500 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! Designed to fit with Gen 3 Ultra Dominator air cleaners and fuel crossovers, allowing you to easily convert your 4500 equipped 800+ horsepower dragster or door car!
  • Bolt on 4500 Flange Carburetor Replacement
  • Supports up to 1500 HP Naturally Aspirated or 1250 HP Forced Induction with Eight 100 Lb/Hr Injectors
  • 2.125€ Throttle Plates, Flow 1440 CFM for large cubic inch engines
  • Gen 3 Ultra Dominator Style 4 Bolt Air Cleaner Flange offering a variety of air cleaner options
  • External fuel pressure regulator required, such as 12-848
  • Integrated ignition timing control
  • 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!
  • OEM Style TPS/IAC, for years of dependable service.
  • 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 MAP Sensor, the harness comes with the connector terminated, making the install
  • Included weld-in O2 sensor bung for the exhaust ensures a leak free oxygen sensor installation
  • Plug and play with Holley EFI Accessories, such as the 12.3€ and 6.86€ Pro Dash
  • and Digital Analog style EFI gauges
  • Available in 2 finishes, Shiny and Black


  • 550-1071
  • 550-1071
  • 090127105252
  • Holley EFI
  • New


Shipping Information

  • Item Requires Shipping
  • W14.5000” x H9.5000” x L25.5000”

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