Ok, to clear up some more of the things said in the post soo far:
1. Yes, it was a really stupid thing to be driving that fast, and I don't really know why I did, but it's kind of a thing that I do with every vehicle I own. hehe, I topped out my GSXR1000 motorcycle this summer, well into the 190's.
2. I believe I was in sixth gear, and don't know the rpm I was at. BUT I can tell you this... There is for SURE a governor set in the car at 160mph. I had the digital speedometer showing 160mph, as well as the needle pointed at 160mph, when it would back me down roughly 5-10mph. It was startling to say the least, the car pulls pretty damn hard all the way to 160, and running into that limiter really caught me off guard.
3. I know that the C5's are unlimited, and my roomate and I put his up to 175mph, and I believe there was still plenty of power to go further. REASON I mention this, is because I know the GTO can go much faster, it has plenty of RPM's left on the tach, as well as the power to keep going. (not that anyone WOULD or SHOULD.)
4. For the guy asking where I did this, I was right outside of Ames, Iowa... Highway 30 was re-paved this summer from Nevada to Ames, and I used most of that stretch to test the 160mph theory.
5. Someone else mentioned the tire rating. Don't quote me on this, but the BFG's are W-rated, is that correct? And I believe W-rating is limited to 160mph which could be the reason the computers won't let us go any faster. As I understand it, a tire manufacturer is not responsible for any tire failure if the user is operating at a speed higher than the tire is rated? I remember seeing something about this a long while back somewhere, anyone care to add to this?
Anyways, I don't plan on going any faster than 160mph. If I want to go faster, I'll just buy another bike. That way I KNOW if I hit something at that speed, I won't be a vegetable for the rest of my life.