I've got an invidia gemini exhaust on my 09 g coupe, its got the catback, beluga racing test pipes, and stillen intakes. Would headers make this car too loud or will the resonators and muffler make no difference in sound.

I've also considered changing the midpipe for the invidia removing the resonators or making a custom y pipe. Does anybody have an idea of how it could change the sound of the car?