ECU Header Connector for K-Series & J-Series Harness Fabrication

The Honda K-Series ECU Header Connector Kit is designed for builders and DIY wiring enthusiasts creating ECU extension harnesses, jumper harnesses, and standalone ECU adapter solutions. This aftermarket ECU header connector interfaces with factory Honda ECU connector openings and is commonly used when building patch harnesses or converting to standalone engine management.

With minor modification, this connector can be adapted for use with OEM Honda K-Series and select J-Series ECU applications, making it a versatile solution for custom wiring projects.

Supports Multiple Honda ECU Connector Positions

This connector kit is designed to support common Honda ECU connector positions, including:

• Connector A (or E)

• Connector B

• Connector D

These connector positions are commonly required when building jumper harnesses between OEM ECUs and standalone systems or when extending ECU wiring for relocated ECUs.

Ideal for Custom Jumper Harnesses & Standalone ECU Installs

This ECU header connector is commonly used for:

• Custom ECU jumper or patch harnesses

• Standalone ECU installations

• ECU extension harnesses

• Bench wiring and testing harnesses

• Custom motorsport wiring projects

It provides a clean, serviceable interface for builders who need direct access to ECU pinouts without modifying the original vehicle harness.

Aftermarket Housing with Proper Terminal Support

The connector housing is manufactured as a high-quality aftermarket component and accepts terminals compatible with 22–20 AWG wiring, making it suitable for signal-level ECU circuits commonly used in engine management systems.

Terminal fitment and retention are designed for reliable electrical contact when properly crimped and installed.

Important Fitment Notes

If your application uses A, B, and E ECU connectors, two connector housings are required to complete the interface.

Due to variations between ECU revisions and connector layouts, reference photos should always be used to confirm correct housing placement before installation.

Minor modification may be required depending on ECU model and application.

Applications

• Honda K-Series engines (K20A, K24A)

• Select Honda J-Series ECU adaptations

• Custom ECU jumper or extension harnesses

• Standalone ECU conversions

• Motorsports and race vehicle wiring

What’s Included

• 1× ECU Header Connector Housing

• Terminals compatible with 22–20 AWG wiring

Installation Notes

Professional wiring knowledge is recommended. Proper depinning and open-barrel crimping tools are required to ensure correct terminal installation and long-term reliability.

This product is intended for experienced builders and technicians familiar with Honda ECU pinouts and wiring practices.

K-Series ECU Diagram