Yesterday on the way home from work I ran into a CTS-V. I drove next to him for about a mile or so. He would speed up then slow down and let me get in front of him. Finally while sitting at a light I figured if he hits it I will too. So the light goes green and I roll out like normal, shift to second and then the guy in the cadi nails it as hes coming up on my side, I let him get about a fender length lead and then roll into it. Once 4000 rpm hit it was "goodbye, thanks for playin." I put about 5 car lengths on him and then let off. At the next light the guy looked over and gave a thumbs up, then he turned right and I drove home. That car was louder than I expected. I've heard other ones and thought they were kinda quiet, but this one was much louder. I don't know if he was stock or not, but either way it was fun.