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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.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
High Quality but with tiny holes
Color: Navy (Blix)
There were two very tine holes on top of the wallet unfortunately. Otherwise the product nice snd high quality. I like it a lot but unfortunately I returned it back. That is the reason I gave 4 starts.
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Reviewed in the United States on June 27, 2025
★★★★★ 5
Timberland quality
Color: Black (Sportz)
Always loved Timberland products never thought of ordering one as a Wallet. Glad you have them out there. I bought one for my son and he liked it so much. I got one for myself. Thank you very much.
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Great value for the style and material
Color: Brown
Purchased as a replacement for my son's previous wallet. He found this same wallet on Timberland's website at a much higher price. He received it and has used it ever since it was delivered. He was very pleased and still is with how soft the wallet is. He likes the style a lot as well.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Perfect wallet
Color: Black (Sportz)
This is a quality wallet that you would think cost more.. nice and thin and that’s why I bought it. My son needed a new wallet and prefers it to be light weight and not bulky. This is perfect. Nice capacity and all you will need. 5 stars.
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Reviewed in the United States on February 21, 2026
★★★★★ 5
Great material
Color: Black (Sportz), Color: Black (Sportz)
Wanted something to use while at work and this wallets definitely does exactly what it should it’s really great quality and it fits all my stuff too
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Reviewed in the United States on February 25, 2026