I have a 2007 SRT8 GC that is my daily driver. These things are super stout right from the factory, 1/4 mile in the high 12's at 106, 0-60 in low 4 second range. They hook up awesome and make all their time in the first 60 feet.
I can easily see how a guy with nitrous can get one into the low-12's. The main problem is the computer programing and the electronic throttle, etc. Supposedly the factory tune only gives 70% throttle in 1st gear and total timing is about 11 degrees when the engine is warm. You can NOT turn off the traction control. I was just told somebody cracked the code to have the ECU tuned to give 100% throttle and about 19 degrees timing. There is also a mod to override the traction control.
I will let you know how it works as soon as the nice UPS man
brings my ECU back!
All I can say is that out of the box these things are a hell of a sleeper car. Who woulda thought, an SUV that runs high 12's stock and is $40k brand new. I remember not that long ago buying an S10 Blazer with a 2.8L V-6 that you almost had to get out and push if you hit some old chewing gum in the Wal-Mart parking lot
Colin