it use together with Microtech LT10s ... it replace the OEM igniter. If you using others Standalone ECU and using stock igniter , you can replace it with this X4 also .
For the Original ECU , I not sure can use this X4 or not.
heres the how to on the ones me and my cuzn did...
we did these on his Almera Gti but this can be done any lights..
Gave it try was realtively easy to be fair
It took about 15min to do the fog lights...