Holley EFI 550-1001 Terminator X Stealth 4150, Shiny
Holley EFI 550-1001 Terminator X Stealth 4150, Shiny
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Holley EFI 550-1001 Terminator X Stealth 4150, Shiny

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Key item features

  • Powerful Performance: Supports up to 650 HP naturally aspirated or 600 HP with forced induction, utilizing four 100lb/hr injectors for robust fuel delivery.
  • Stealthy Installation: All wiring exits discreetly below the rear fuel injector cover, ensuring a clean and hidden setup.
  • Integrated Control: Features integrated ignition timing control for improved idle stability, fuel economy, and wide-open throttle performance.
  • User-Friendly Tuning: Includes a high-resolution full-color touchscreen and a simple calibration wizard for initial setup and tuning without a laptop.
  • Advanced Sensing: Equipped with a Genuine Bosch LSU 4.9 Wideband Oxygen Sensor for real-time fuel map learning and OEM style TPS/IAC for dependable service.
  • Versatile Compatibility: Offers transmission kickdown provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications, with specific kits providing control for Pre-2009 GM 4L60E/4L80E transmissions.
  • Air Cleaner Ready: The air entry is precisely machined to accommodate most stock-style air cleaners, including provisions for an air cleaner locator.
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