YES, no problem. However, the positive offset on the C6 rear wheels is greater, since the C6 body is narrower. A 1/4" hub-centric spacer is needed for proper track in the rear. Forum member vetterdstr used to run these on his C5 vert. Here is a picture of his car with C6 OEM wheels:
__________________ —Bob
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The calculation of offse tis relate to the width on a wheel. Just because you see 2 different numbers doesn't mean the wheel wont fit. The rear offset on the 2004 Z06 wheel is not the same as a stock wheel due to the two wheels being a different width.
A hubcentric spacer works fine even in drag applications. I know because I did it. My cousin's 2002 trans am is also running stock C5 wheels (from me) for 2 years now with spacers and he drives it like he stole it.
A 1/2 inch spacer would be better since it will just about cancel the 14mm difference in offset (79mm-65mm) 'tween C6 and C5 wheels, putting the center of the wheel back where it belongs in the wheel well. The wheel will stick out nearly a 1/4 inch further than stock C5 because its a 1/2 inch wider - but who cares?
I own a C6, and I'm buying new wheels and tires, I need to sell my C6 wheels and tires first, The wife said so Stock chrome wheels with stock C6 tires only $2,000.00 Call me for details.
Joe Fethel
Orange county California
(714)437-7700 WK
(949)495-1753 HM
(949)842-3792 Cell jfetchel@aol.com