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Description
Holley EFI CAN Input/Output Module - Without Harness 554-166Adds Up To Eight Inputs and Outputs Features: This module is perfect for anyone wanting their Holley EFI ECU to control more functions or monitor more data channels1 HP and Terminator X EFI installations with only 4 inputs and 4 outputs can now add more functionality to their EFI system! 2 Quickly expand Dominator ECU? s Input Output control with 8 additional inputs and outputs3 The 554 165 kits contain a pre terminated CAN Harness, allowing you to
Adds Up To Eight Inputs and Outputs
Features:
- This module is perfect for anyone wanting their Holley EFI ECU to control more functions or monitor more data channels1
- HP and Terminator X EFI installations with only 4 inputs and 4 outputs can now add more functionality to their EFI system!2
- Quickly expand Dominator ECU?s Input / Output control with 8 additional inputs and outputs3
- The 554-165 kits contain a pre-terminated CAN Harness, allowing you to quickly install the Holley EFI CAN Module to any existing Holley EFI installation.4
- Inputs can be used for things such as:5
- -Switch 12v Toggle Switches - can be configured for external mechanical relays, or setup as digital switches via a Holley EFI dash6
- -Ground input for brake pedal switch7
- -5v analog inputs for sensors like fuel pressure, oil pressure, or nitrous bottle pressure8
- -Thermistor inputs for Coolant temperature sensors9
- Outputs can be used for things such as:10
- -Switch Low (Ground) ? For relay control or activation11
- -Switch Low PWM (Ground) ? PWM Fan control ? PWM Fuel Pump control - or other PWM- controlled devices.12
Specs:
| Brand | Holley EFI |
|---|---|
| Emission Code | 5 |
| Product Type | CAN Input Output Module |
| Warning | California Proposition 65 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.7 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Finally! A Book That Teaches Kids How to Calm Down
Format: Board book, Format: Board book
Pediatrician approved! This is a great book for toddlers, preschoolers and even school-age kids! What sets this book apart from other books on this topic is that it helps kids understand the physical sensation of their emotions. It explains what is happening in their brains and bodies when those feelings start to get "too big.” Also, instead of just telling a child to stay calm, it gives them safe, tangible ways to actually do it like belly breathing, asking for a cuddle, and so many more , As a Pediatrician who works closely with children and families, I can’t recommend this enough. It’s a gentle, practical, and science-backed tool that turns a stressful meltdown into a teaching opportunity. Will be buying more copies of this book for my kids preschool and school!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026
★★★★★ 5
Different ways that really help
Format: Board book
Helps so much
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 5
Loved this book, really helped with my kids!
Format: Board book
This book is so helpful to give parents the language to talk through feelings with their kids! I have big feeling kids and often the social media scripts can feel awkward and forced. I love that this book helps me have that conversation while my kids are calm and enjoying the cute pictures. I really liked the other two books by Dr. Goodwin and this one is a great addition!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026
★★★★★ 5
Perfect book with a strong research basis presented in an age-appropriate and fun way
Format: Board book
Fantastic, research-based book - I love the clear detailing of specific strategies (not just "use strategies" like other books often have) and it's written at a level that is easy to understand for a variety of ages. It's also pleasant to read as an adult, which you can't say about many didactic books like this. Illustrations are very cute. I can already tell this will be a powerful book in our arsenal!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026
★★★★★ 5
Most Useful and Applicable Toddler Book I’ve Found
Format: Kindle
Goodwin’s series continues to be one of my favorite parenting tools I’ve found. While my toddler loves the images and messaging, Goodwin’s applicable and usable tip list in the back of her books is the secret sauce that sets her apart. A must for caregivers of young children!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 27, 2026
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