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Those numbers seem pretty accurate. Though I believe the 0-60 may be a little faster. GM quotes 4.75 w/3.15 rear and 4.9 w/ 2.73 rear and 4.55 with 6 speed (Driver and track conditions aside).
Here is a link for 2001--same as 2004 http://www.corvettemuseum.com/specs/...erformance.htm
:D
I have seen quite a few A4's run down the track at Firebird when I lived out there. The stock ones with the perf. gear were running 13.4's @ 107-108. Thats about as real world as I can get for you, seeing as it's a track in your area ;) Remember Phoenix is not quite sea level :)
Good luck. After you run it let us know how she does :cheers: