Holley HP EFI ECU and Harness Kits 550-606N

5 out of 5 stars ( 1 )

Part Number: HLY-550-606N

$2,999.95

Engine Management Systems, HP EFI, ECU and Harness, Up to 16-Injectors, 8-Coils, Four Digital Inputs, NTK O2, Wideband, CANBUS, Ford, Multi-Point, Kit
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Holley HP EFI ECU and Harness Kits 550-606N

Holley HP EFI ECU and Harness Kits 550-606N

HLY-550-606N

5 out of 5 stars ( 1 )

Part Number: HLY-550-606N

Estimated Ship Date from Texas: Monday 10/19/2026

$2,999.95

Estimated Ship Date from Texas: Monday 10/19/2026 Would you rather pick it up?

Overview

Brand:
Manufacturer's Part Number:
550-606N
Part Type:
Product Line:
Summit Racing Part Number:
HLY-550-606N
UPC:
090127687499
Transmission Controller Included:
No
Boost Control:
Yes
Traction Control:
Yes
High Impedence Injectors:
Up to 16
Low Impedence Injectors:
Up to 16
Fuel Injector Connector Style:
Jetronic/Minitimer/EV1
Coils:
Up to 8
Ignition Coil Connector:
Ford TFI 5-pin
Digital Inputs:
4
Wideband Controller:
Yes
Wideband Channels:
1
CANBUS Enabled:
Yes
CANBUS Networks:
1
Knock Control:
Yes
Knock Channels:
2
Drive-By-Wire Capable:
No
VVT Control:
No
Nitrous Control:
Yes
Launch Control:
No
Engine Protection:
Yes
Flex Fuel Compatible:
No
Multi-fuel Capable:
No
Data Logger:
Yes
Oxygen Sensor Included:
Yes
Display Included:
No
Handheld Controller Included:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Includes NTK wideband oxygen sensor. Designed for use with Ford multi-point EFI.

Holley HP EFI ECU and Harness Kits

Holley HP EFI ECU and harness kits allow you to manage automotive functions—like the fuel and ignition of your engine, along with controlling nitrous, boost, or water/methanol. Select the model with options needed for your vehicle application. (Note: some models are engine-specific.)

Features and notes:

* Eight sequentially driven 8:2 peak and hold injector drivers capable of driving up to 16 low or high-impedance injectors are standard
* 8-channel distributorless ignition (DIS) outputs capable of directly driving "smart" ignition coils or Holley DIS coils
* Integrated, single-channel wideband oxygen sensor control. Works with NTK or Bosch sensors. More channels can be added via CAN bus.
* Internal data-logging is standard, with a huge 2GB of memory
* 4-stage progressive nitrous control
* Turbo boost control
* Integrated water/methanol injection control
* Self-tuning fuel table strategy greatly simplifies tuning process
* Individual cylinder fuel and spark control allow you to unlock your engine's potential
* Compatible with 4, 6, and 8-cylinder engines
* Unique lbs./hr.-based fueling strategy greatly simplifies tuning
* Advanced idle, closed loop, and enrichment strategies allow for very stable operation
* Fully potted and can be mounted in the engine compartment or interior
* Sealed automotive and marine-grade connectors
* Allows for use of common OEM sensors, as well as customer sensor calibration input
* Ignition plug-and-play with GM 24x and 58x LSx engines, GM HEI, Ford TFI, magnetic, and hall effect trigger, and other ignition systems
* 1-5 bar MAP sensor capability
* 2-channel knock control sensor inputs for both one and 2-wire knock sensors
* Dedicated fuel and oil pressure inputs
* Control both stepper and PWM idle air control (IAC) motors
* Speed density, Alpha-N, or combination fueling strategies
* Four programmable high or low pulse width modulated (PWM) outputs and four fully configurable inputs can be configured for use
* Lean or rich safety cutoff

Applications

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Instructions & Calculators

Instruction Sheets for Part Number HLY-550-606N

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