This is used when fitting a stand alone ecu to a Supra and replaces the factory Fuel Pump ECU

When running a larger fuel pump, Walbro 400/450/485 the factory ecu cannot take the load and will shut down.

If using a Walbro 525 then its advisable to change all the factory wiring and we have a kit for this.

Please specify if you would like the relay switched negatively or positively.