The J3 connector kit from Holley EFI gives builders and technicians a way to source a single I/O connector without having to purchase an entire wiring harness connector kit. It's part of the J1A through J4 lineup of OEM-quality connectors Holley offers for custom and repair wiring work.
Specifications:
- Connector type: J3, electrical pin connector
- OEM-quality connector and pins
- Black connector color
- Ideal for DIY or custom wiring harness builds
- Part Number: 570-347
Sold as an individual connector kit — no need to buy a full harness kit if only one I/O connector is needed.
FAQ
What is the Holley J3 connector kit used for?
It provides a single OEM-quality I/O connector for custom or repair wiring harness work on Holley EFI systems, without requiring a full connector kit purchase.
Does the kit include pins?
Yes, the J3 connector kit includes OEM-quality connectors and pins.
What color is the connector?
The connector is black.
Can this be used for a custom wiring harness build?
Yes, it's designed to be a good fit for DIY or custom wiring harness builds in any application.

