Holley EFI CAN Input/Output Module - Without Harness 554-166
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Features:
- Perfect for anyone wanting their Holley EFI ECU to control more functions or monitor more data channels
- HP and Terminator X EFI installations with only (4) inputs and (4) outputs can now add more functionality to their EFI system
- Expand Dominator ECUÕs Input / Output control with (8) additional inputs and outputs
- Inputs can be used for things such as:
- -Switch 12V Toggle Switches - can be configured for external mechanical relays or setup as digital switches via a Holley EFI dash
- -Ground input for brake pedal switch
- -5v analog inputs for sensors like fuel pressure, oil pressure, or nitrous bottle pressure
- -Thermistor inputs for Coolant temperature sensors
- Outputs can be used for things such as:
- -Switch Low (Ground) - for relay control or activation
- -Switch Low PWM (Ground) - PWM Fan Control Ð PWM Fuel Pump Control - or other PWM- controlled devices
About Holley EFI

Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!
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