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Fuel Injection Style
- Multi-port (3) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
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Metering Style
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Make/Engine
EFI System Kit Number
- HLY-550-603 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Price Range
- $500-$750 (3)
- $750-$1000 (2)

Holley EFI Systems Wiring Harnesses

4.77 out of 5 stars 31 Customer Reviews

Holley offers a variety of direct replacement EFI wiring harnesses, including multi-port, sequential, and throttle body injection styles. These units are made with premium components to ensure better reliability and performance for your ride--and they're compatible with many engine swaps. Holley EFI systems wiring harnesses are sold individually or as a kit; choose the model needed for your fuel injection application.

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