Best I've done with my G-tech is 4.82 seconds (temp. was about 80 degrees). I guess that puts me on par with the e46 M3 and 335i. Oh wait, I forgot they're both faster than the z06 - kidding, I kid BMW drivers. Although I am skeptical of most 0 to 60 times, I swear they get those numbers by removing the spare, putting on hubcaps, and using a midget to drive.