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.
I'm driving wira aeroback 1.5 special edition....i have just changed my air filter from original to K&N 3" type air filter. I just want to know do i need to tune my car after change tis filter....Thank you