I just purchased a Benz E55. For those unfamiliar its a 4 door coupe with super charged 5.4 liter V8. 469 hp 516 lb/ft torque. I just came up against a new SRT. I rolled up next to two guys at a light. I knew the passenger. So we agreed to run. We started off right with each other and then I started to pull in 2nd. From there I had 2 cars on him. We got up to over 150 and he never got any closer. (He didn't miss a shift either.) I thought he would pull on me but didn't. We didn't get a chance to run again after that. Being a viper owner myself, I was quite surprised. He did have the extra weight of the passenger though and I know he weighs at least 200, so that makes some difference. So if you run into one don't under estimate them! They're pretty quick.