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Holley EFI

J1A/J1B ECU Connector Kit

J1A/J1B ECU Connector Kit with Pins and Seals

Part # 558-448 Be the first to write a review
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If you already have your own wire and simply need the connectors and pins, we have you covered with our new ECU connector and pins kit, allowing you to fully terminate your own custom main harnesses!


  • Pre-Terminated J1A and J1B Tyco Superseal Connectors
  • 60x - 20-22ga pre-terminated wires
  • 20x - 16-18ga pre-terminated wires
  • 30 cavity plugs

About Holley EFI

Holley is the new standard in EFI! Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever!

Brand Holley EFI
Emission Code5
Product TypeConnector Kit
Part Number558-448

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.


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