Unless your going to be running some major power, I wouldn't worry about the exhaust. Your stock exhaust should handle up to about 400hp or so. Once you get up there, then I would consider it.
But If your going for sound/looks and not just performance, than yeah, I would change it. A good sounding exhaust is always up there in my book.
But If your going for sound/looks and not just performance, than yeah, I would change it. A good sounding exhaust is always up there in my book.