Get an attorney and let them tell you what to do. If you are looking at a license suspension it is definitely worth the money for the Attorney.
Frankly I think everyone telling him to get an attorney is giving bad advice. Let's throw out everything that has been said about the application of the law and all the arguing over what the cop should or shouldn't have done. Let's JUST take the first sentence of the OP:
I was at a light ready to run against a z28 in my 03 cobra, I let the z28 leave first for a split second, planted the cobra and started to take off
So the OP, admits guilt (no such thing as innocent until proven guilty here)
So the OP participates in illegal street racing
The OP losing his license to drive for 6 months is a good thing as it takes a street racer off the streets even if it is only for 6 months.
If the OP DOES go to court we can only hope he loses his license of longer than 6 months. The people who live in his town will be safer for it.
I really don't see where the argument is.