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Holley EFI Releases Terminator X Stealth 4500 System

By: Holley EFI | 12/10/2020 < Back to Motor Life Home
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  • Bolt on 4500 Flange Carburetor Replacement
  • Supports up to 1,500 HP Naturally Aspirated or 1,250 HP Forced Induction with Eight 100 Lb/Hr Injectors
  • 2.125” Throttle Plates, flows 1440 CFM for large cubic inch engines
  • Gen 3 Ultra Dominator Style 4 Bolt Air Cleaner Flange offers a variety of air cleaner options
  • External fuel pressure regulator required, such as PN 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!
  • The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
  • OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service
  • 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; CAN EGT; and Digital Analog style EFI gauges
  • Available in 2 finishes, Shiny and Black


The new Terminator X Stealth 4500 EFI system from Holley features eight 100lb./hr fuel Injectors capable of supporting up to 1,500 horsepower naturally aspirated or 1,250 horsepower on forced induction applications. The Terminator X ECU is capable of fuel map self-learning and ignition timing control, which will improve idle stability, drivability, and wide-open throttle horsepower! The Terminator X Stealth is 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 to fuel injection!

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