History Black Carbon

What Supercar was this?

I was riding on the interstate on my motorcycle, and this car passed me like a ninja ghost! It went by so quickly I didn't get a side view, and it was going so fast that I sped up to 85 briefly to try to catch it and it was history. I HAVE TO KNOW WHAT IT WAS!!! It was sleek and low, and rounded. Black up the middle and red on either side (the black may have been carbon fiber). The ONLY CLUE I have is that it had "RS" in red on the right side, between the tag and the tail lights. Any supercar experts out there that can clue me in?

just your basic super street racer out there showing off.

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