Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
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
4.2 ★★★★★
Based on 2279 reviews
Sort
Product Reviews
★★★★★ 3
They need to find a better way to ship it
Style: 1 gal
What was left in the bottle worked great. However, the cap was off of the jug when I opened the package. Ididn't have enough for the other tires.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
★★★★★ 5
Good
Prefect. It’s exactly what my lawnmower needed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
★★★★★ 5
Snowblower repair.
Snowblower spark plugs that work for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
★★★★★ 5
Fast delivery and good price
Good price and name brand
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
★★★★★ 4
Gas welder "lincoln "
Fit as expected
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2026
recommand products
Milton S-1803 1/4" FNPT P Style Coupler (1 unit)
25.23
N-Fab Nerf Step 07-13 Chevy-GMC 2500/3500 07-10 1500 Regular Cab - Gloss Black - Cab Length - 3in - C0753RC
215.00
N-Fab Nerf Step 07-10 Chevy-GMC 2500/3500 Crew Cab 8ft Bed - Tex. Black - Bed Access - 3in - C07115CC-6-TX
200.00
KNIPEX Tools - Cobra QuickSet Pump Pliers (8721300SBA)
95.55
N-Fab Nerf Step 07-10 Chevy-Cadillac Avalanche/Escalade SUV 5.3ft Bed - Tex. Black - W2W - 3in - C0780A-TX
275.00