Yes 4.08 is pretty fast but I have been hearing really great numbers on the strip. I think the Z06 gets 12.3-12.4sec @113-116mph. Guys don't get me wrong I never said the Z06 looks better than the 550, I said it looks better than the 360. The 550 is just beautiful, and the 360 really isn't (to me at least). If I was offered a ZR1 I'd take that over a 550 or a 360.