SKU: 13755073996

Holley EFI CAN Input/Output Module - Without Harness 554-166

Sale price$191.67 Regular price$212.97
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  • CAN

Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

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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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SKU: 13755073996

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4.0 ★★★★★
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Keith
Alexandria, US
★★★★★ 5
Great socks
Number of Items: 6, Color: Black (6-pairs), Size: Medium
I love these socks
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
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ok
Dallas, US
★★★★★ 5
Good socks
Number of Items: 6, Color: White (6-pairs), Size: X-Large
I have size 13 feet and these are great maybe they’ll stretch and be a bit big but I m fine with that
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
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Wendy H.
Waukegan, US
★★★★★ 5
Well made socks
Number of Items: 6, Color: Black (6-pairs), Size: X-Large
Made well. Bought for my Son. He only likes Under Armour brand of socks. Only socks he buys.
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Reviewed in the United States on April 21, 2026
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September Hall
Birmingham, US
★★★★★ 5
Great no show socks
Size: Small, Color: (725) Oxford Brown / Oxford Brown / Black
Very comfortable and perfect fit for my small feet. I love the full coverage sock feel with a totally no show sock.
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Reviewed in the United States on May 29, 2026
A
Verified Purchase
ABK
Omaha, US
★★★★★ 5
Great no shows for people with larger feet
Size: Large, Color: (001) Black / Black / Castlerock
Some of my favorite socks!! Great quality, fit, and material. I love that they don't slip down in my shoes, especially considering I have larger feet. I also love that Under Armour offers larger sizes in their socks considering everyone in our household has much larger feet than others.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026

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