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The stock tires have about an inch of difference between front and rear in diameter. Your combo should be about the same front and rear, so it may throw off the computer, and probably look kind of odd, too.
The stock tires have about an inch of difference between front and rear in diameter. Your combo should be about the same front and rear, so it may throw off the computer, and probably look kind of odd, too.
I doubt that you will get any codes. Real problem occurs when tires are the same front to back or larger in the front. Some on here have posted no problems with same diameter front or back. If you have a 1/2" difference should be okay.
I see you are already lowered. With 1/2" difference with new tires you could raise the back up 1/4" and be close to Z06 specs. I have seen other members running 275/35/19 front and 295/35/19 rear without problems.
C5 coupe has .98" difference front to back w/stock tires
C5 Z06 has .78" difference front to back w/stock tires