Mopar Question

On the way to the Nationals on Saturday, I pulled up behind this bad *** sounding Challanger. The only picture I got of it was from behind thru the windshield of my RAM. Notice the "570" and "SMS" badges on the back. It looked almost like a factory job with the SMS molded into the bumper.

So the question is - Does anyone know anything about this car?

Ma Snart