The Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Sniper Stealth 4150 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, 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 a complete installation, Master Kits include a complete fuel system with an external fuel pressure regulator preset to 58.5psi, 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware, and bulkhead fitting to return fuel into the tank!

Features:
  • Bolt on 4150 Flange Carburetor Replacement
  • Throttle body mounted ECU – no extra boxes to mount
  • Supports up to 650hp with Four 100 Lb/Hr Injectors!
  • 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.
  • Air entry is machined to fit most stock style air cleaners with air cleaner locator provisions.
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886.
  • 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, 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
  • More From This Category

    Holley Fuel Injection System Wiring Harness, Ignition Adapter, Sniper 2 EFI, Input, Pro-Billet, Crank Trigger, Each

    Holley Fuel Injection System Wiring Harness, Ignition Adapter, Sniper 2 EFI, Input, Pro-Billet, Crank Trigger, Each

    $71.35

    View
    Fuel Injection Systems, Sniper 2 Upgrade Kit, 4150 Throttle Body. 650 Max HP, Polished, Kit

    Fuel Injection Systems, Sniper 2 Upgrade Kit, 4150 Throttle Body. 650 Max HP, Polished, Kit

    $2,342.24

    View
    Sniper / Term Braided Crossover W/ Reg

    Sniper / Term Braided Crossover W/ Reg

    $445.43

    View
    Holley Fuel Injection System, Holley Sniper 2 EFI, Self-Tuning, PDM, Polished Throttle Body, Kit

    Holley Fuel Injection System, Holley Sniper 2 EFI, Self-Tuning, PDM, Polished Throttle Body, Kit

    $2,962.05

    View
    Sniper EFI Sniper Idle Air Control Plug, Holley EFI, 2 x 4, Each

    Sniper EFI Sniper Idle Air Control Plug, Holley EFI, 2 x 4, Each

    $45.26

    View