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Home NEWS

Holley News – Sniper EFI Releases New Stealth 4150 Models!

TB Admin by TB Admin
November 25, 2019
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Holley is pleased to announce the release of a new fuel injection system from their Sniper EFI division – Modeled after an Ultra XP carburetor, the Sniper Stealth 4150 features four 100 lb/hr injectors, dual feed configuration and supports up to 650 hp naturally aspirated! Other features include the high pressure fuel crossover line (already in the box), rear exit wiring for easier routing and a more stealth look, and a timed spark port located under the front injector cover (fuel bowl) making this a convenient and very capable system. Read on to learn more about these awesome new products!


Sniper EFI Stealth 4150

The Sniper Stealth 4150 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, driveability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications.

For full product details and a complete array of savable high-resolution photos (click image until you reach the largest size, and then right-click the image and click “Save As”), click here.


Sniper EFI Super Stealth 4150 – 650 HP

-Throttle body mounted ECU – no extra boxes to mount
-Supports up to 650HP with four 100lb/hr Injectors
-Includes high pressure fuel crossover line
-All of the wiring exits below the rear fuel injector cover, for a completely stealth 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

For full product details and a complete array of savable high-resolution photos (click image until you reach the largest size, and then right-click the image and click “Save As”), click here.


Sniper EFI Super Stealth 4150 – 1250 HP

-Supports up to 1250HP with eight 100lb/hr Injectors
-External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886.
-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 realtime Fuel Map Learn!
-OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service.
-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
-Available in 3 finishes: Shiny, Black and coming soon, Gold

For full product details and a complete array of savable high-resolution photos (click image until you reach the largest size, and then right-click the image and click “Save As”), click here.

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