my cousin has a ford car with an intake box and a ram air and that sounds cool. He has two turbos also but I don't really need those as my cousin says they take too much fine tuning and I heard elsewhere I would have to start on premium fuel.
My muffler is stock I think and it just has an end cap.
ZZP has a tune you can do that will wake up your car quite a bit, intake makes it sound better but doesn't do much without a tune, and something can be said for an exhaust. What are you wanting to do with the car?