I've never been surprised by an S550. Perhaps I'm driving the wrong streets?
I don't know, I haven't been surprised by one on the streets myself I guess I'm just speaking hypothetically
I saw a video about how the S550's can get to about 500hp with a few bolt ons, knowing that the stock 07-09 GT500's make anywhere from 450-500whp makes me think that if I run into the right S550, he'll show me his tail lights