phone: 888-314-7772


Holley Sniper Efi Super Sniper Stealth 1250 - Black

Write a Review
Usually ships within 24 hours.
Free Shipping
  • Free Ground Shipping

  • 30-Day Returns

  • Safe Payments

  • Top Tier Brands

If you're aiming for substantial power gains, the Super Sniper Stealth 1250 is tailor-made for you! Holley's Sniper EFI Super Sniper Stealth 1250 offers the optimal solution to convert your carbureted engine to fuel injection, requiring just 4 straightforward connections. This robust system can support up to 1250HP when boosted with 8 100 LB/HR Injectors. With the Stealth 1250 system, you retain the classic carburetor styling while enjoying the advanced functionality of a Sniper! Featuring a 4-barrel design with a single-pattern bolt-on, it is crafted to fit 4150 flange manifolds. The Super Sniper Stealth ECU boasts fuel map self-learning and ignition timing control, enhancing idle stability, drivability, and wide-open throttle horsepower. The kit also includes transmission kick-down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications!

We prioritize simplicity for you! Sniper kits are designed for easy installation at home in your garage or driveway with minimal tools, supported by Holley's comprehensive installation manual and videos. Spend an afternoon in the garage, and you'll be relishing improved engine performance, better MPG's, and easier starting. After the straightforward installation, let your Sniper initiate the self-tuning process. The user-friendly calibration wizard requires you to answer a few questions about your engine, and the system will begin self-tuning without needing a laptop. No need to be a computer whiz or tuning expert to use a Sniper EFI system! Utilize the high-resolution 3.5" full-color touchscreen for tuning and gauge displays.

Sniper EFI is an integral part of a comprehensive ecosystem! Your new Sniper kit seamlessly pairs with Holley's Sniper Hyperspark Ignition, Fuel Systems, Air Cleaners, Throttle Body & Digital Dash to unlock the full potential of your build. Complete your fuel injection journey by exploring our full range of ignition, fueling, and accessories!


  • Bolt-on 4150 Flange Carburetor Replacement
  • Self-tuning ECU means you don’t have to be a computer/tuning whiz to have EFI!
  • 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!
  • Only 4 Wiring Connections Required! (Battery +, Battery -, Switched Ignition & RPM)
  • High-Resolution Full-Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
  • Supports up to 1250hp with Eight 100 Lb/Hr Injectors!
  • Throttle body-mounted ECU – no extra boxes to mount
  • All wiring exits below the rear fuel injector cover for a completely stealthy installation.
  • Timed spark part for vacuum-advanced distributors located under the front fuel bowl for easy access to the distributor.
  • Programmable inputs and outputs
    • Three Programmable 0-5V Sensor Inputs for Oil/Fuel/Dome or Nitrous Pressure Sensors
    • Six Programmable Ground Outputs
    • One +5v Reference Output - +5V Power Supply for 0-5v Sensors
    • One Sensor Ground – Ground supply for 0-5v Sensors
  • 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
  • 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 coming soon, Gold
  • Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak-free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
Local Pickup Available:
Local Delivery Available:
Additional Handling: