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Holley EFI 550-617N - 4V Ford Modular EFI Kit, Ntk O2, Jetroni

Holley EFI MPFI Kits

Complete 99-04 4 Valve Ford Modular Engine Plug and Play Kit - Jetronic "Bosch Style" injector harness - Includes NTK Oxygen Sensor
Availability: Will be special ordered for you.
Pricing: $2,870.95



Looking for a plug and play kit for your Ford Modular engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more! Is your cam too wild for a MAF? Power adders? You name it, and Holley EFI can handle it.

• Designed specifically for 1999-2004 Ford Modular 4 Valve Engines
• Plug and play with factory sensors; Crank, Cam, TPS, Coolant Temp, etc
• Plug and play with factory actuators; Coils, Injectors, IAC
• Connectors for Holley Fuel Pressure and Oil Pressure sensors
• Connectors for expanded Inputs and Outputs
• Complete plug and play kit includes HP ECU, NTK O2 sensor, MAP sensor, Coil Drivers and all necessary Harnesses
• The NTK Oxygen Sensor is recommended when using leaded or methanol fuels, high exhaust and forced induction applications or for highest precision feedback

California Proposition 65

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Holley HP EFI systems are equipped with 4 programmable inputs and 4 programmable outputs that are ideal for most vehicles with a single power adder. This feature allows the user to configure the system to support a wide range of controls including boost control, progressive nitrous, water/meth injection, speed inputs, fuel pump control, AC inputs, timing retard inputs and various other uses. When selecting an ECU, users need to ensure their planned controls can be run with the 4 inputs and 4 outputs as certain combinations may use more I/Os than are available. If more I/Os are required, users should choose the Dominator VMS. ECU is certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance.
Software and firmware updates can be downloaded here for free.


  • 550-617N
  • 550-617N
  • 090127716120
  • Holley EFI
  • Will be special ordered for you.
  • New


Shipping Information

  • Item Requires Shipping
  • 10.6 lbs.
  • W12.6000” x H9.4000” x L14.7000”


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California Residents: Prop 65

WARNING: Cancer and Reproductive Harm -