Will 345 30 19 tires fit on my stock 2006 Z06?
Yes, they will fit fine.
How do you know?
The difference between those 19" rims vs the 18" stock rims and tires, you are at + 5.57%, it is usually recommended to not go over 3%. Go 305/30-19's on the rear only. Check this link out for front tires size recommendations......http://www.corvetteforum.com/forums/c6-tech-performance/2301390-c6-tire-size-upgrade.html
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