I´ve the "state of the art" K&N filter kit installed on my car. Should I upgrade to a bigger filter to let the air easier flow to the supercharger? Can I have more benefits from a bigger filter when I upgrade to 8psi?

Is too big bad?

 

I never heard big was bad. you should be ok

 

the piping can be too big...but thats hard with a supercharger, a good 3" pipe will be good, the filter doesn't really matter, bigger probably better there