CodeBlack

Can anyone provide the size sport cups you are using for your C6Z06. I have a spare set of oem wheels and would like to use them for the track with sport cups. If the sport cups can't be matched I'll use Hoosier R6s.

Poor-sha

295/30-18 f 325/30-19 r

CodeBlack

Thanks, any rubbing problems or engine drag lights etc using this combo?

Poor-sha

None at all. In fact I went with the 325 rears to keep the difference in diameter F/R as close to stock as possible. I know others have been running 345 rears without trouble as well.