'POWERFUL' Main Relay Kit
This HA Motorsports / The ECU Guy 'powerful main relay kit' replaces the factory Honda Main relay setup while maintaining the factory ECU controlled switching operation. Other cheaper models that use a single relay do not retain the factory ECU controlled switching system and are prone to failure. This completely new design incorporates the original audible 'click' when it turns on and has robust 50amp optional fuel pump input/output M8 wiring connectors. This allows you to run an aftermarket high-demand fuel pump directly through this relay. No need to feed another relay and make more wiring mess, just run a dedicated battery cable to the M8 input stud inside the powerful main relay, and the other wire from the M8 output stud to your fuel pump. Easy, simple, powerful. Still using a fuel pump that doesn't need the extra power? The factory fuel pump wiring remains intact and will work with no changes needed.
The powerful main relay uses a new style connector, which is different than the OEM Honda connector. For this reason, the powerful main relay includes our harness that allows you to plug directly into your factory main relay connector. Yep, plug and play. Choose the correct version for your vehicle using the guide below:
OBD0 Harness style (white connector):
- 86-87 Civic Si / CRX Si
- 88-91 Civic / CRX
- 86-93 Integra
- 86-89 Accord
- 85-91 Prelude
OBD1/2 Harness style (brown connector):
- 92-00 Civic
- 93-97 Del Sol
- 94-01 Integra
- 00-05 S2000
- 97-01 CRV
- 90-02 Accord
- 92-01 Prelude
- 97-03 CL