Holley EFI 550-850
Holley EFI 550-850
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Holley EFI 550-850

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Key item features

  • Bolt on 2300 Flange Carburetor Replacement
  • Supports up to 350HP with Two 100lb/hr Injectors
  • Equipped with C4 / C6 Ford transmission kickdown lever as well as TH350, 400 and 700R4 provisions
  • Accepts many common 5 1/8" OEM or aftermarket air cleaner assemblies
  • Throttle body mounted ECU â€" no extra boxes to mount
  • Integrated ignition timing control
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
  • 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
  • Sniper EFI Software free to download which allows for realtime tuning
  • Printable throttle body flange template included
  • Certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Making Sniper EFI the perfect choice for carburetor to marine fuel injection conversions!
  • A Flame Arrestor is REQUIRED for marine installations, such as part number, 720-1 or 720-13
  • Patent Pending
Current price is $1,299.95
Price when purchased online
  • Free shipping
  • Free 90-day returns

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Columbus, 43215
Arrives by Tue, Feb 3
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Comparison Chart:
Vehicle model550-850Holley EFI 550-850550849KHolley EFI 550-849K351WHolley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount TopGo EFI 4 600 HPEFI4 BLK KT W/ INLINE FP550-511-BXXHolley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDMFoxbodyHolley EFI 558-513 EFI MPFI Harness Kits550849Holley EFI 550-849Coyote 5.0L V8Holley EFI 839031 Engine Intake ManifoldLSHolley EFI 558-453 CAN Adapter Harness - 8 Foot Length
Vehicle makeFordHolley EFI 550-850FordHolley EFI 550-849KFordHolley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount Top-EFI4 BLK KT W/ INLINE FP-Holley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDMFordHolley EFI 558-513 EFI MPFI Harness KitsFordHolley EFI 550-849FordHolley EFI 839031 Engine Intake ManifoldGMHolley EFI 558-453 CAN Adapter Harness - 8 Foot Length
Vehicle fitment typeSpecificHolley EFI 550-850SpecificHolley EFI 550-849KSpecificHolley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount TopUniversalEFI4 BLK KT W/ INLINE FPSpecificHolley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDMSpecificHolley EFI 558-513 EFI MPFI Harness KitsSpecificHolley EFI 550-849SpecificHolley EFI 839031 Engine Intake ManifoldSpecificHolley EFI 558-453 CAN Adapter Harness - 8 Foot Length
Automotive parts divisionPerformanceHolley EFI 550-850PerformanceHolley EFI 550-849KPerformanceHolley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount Top-EFI4 BLK KT W/ INLINE FPPerformanceHolley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDM-Holley EFI 558-513 EFI MPFI Harness KitsPerformanceHolley EFI 550-849PerformanceHolley EFI 839031 Engine Intake Manifold-Holley EFI 558-453 CAN Adapter Harness - 8 Foot Length
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