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$1,222.95
$1,099.95
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny

Holley Sniper 550-870 Stealth 4150 EFI, Shiny

Universal Fit, 4-Barrel Square Bore Carburetor Flange Type, Throttle Body Injection Style

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Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
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Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
Holley Sniper 550-870 Stealth 4150 EFI, Shiny
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We estimate this item will ship on or before April 2nd.
Part # 425550870
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Details

Carburetor Flange Type:
4-Barrel Square Bore
Injection Style:
Throttle Body
User Tunable:
Yes
Self Tuning:
Yes
Injectors Included:
Yes
Injector Size:
100 lbs./hr.
Intake Manifold Included:
No
Metering Style:
Speed density
EGR:
No
CFM:
870 CFM
Throttle Body Included:
Yes
Throttle Body Material:
Cast Aluminum
Throttle Body Finish:
Polished
Venturi Quantity:
4
Fuel Pump Included:
No
Fuel Rails Included:
No
Calibration Module Included:
Yes
ECM Included:
Yes
Wiring Harness Included:
Yes
Fuel Pressure Regulator Included:
No
Distributor Included:
No
MAP Sensor Included:
Yes
IAC Motor Included:
Yes
IAT Sensor Included:
Yes
TPS Sensor Included:
Yes
Finish:
Polished
Use with Power Adder:
Yes
Max Horsepower Rating:
650
MFG. Part #:
550-870
Sold in Quantity:
Kit

Info

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?

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!
  • Includes high-pressure fuel crossover line
  • All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
  • Timed spark port 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 12-882.
  • 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 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 (550-870), Black (550-871), and Gold (550-872)

Installation Instructions

Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 2 business days for Holley Sniper to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
Some parts are not legal for use in California or other states with similar laws/regulations

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