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Front is 17X9.5 54mm offset
Rear is 18X10.5 58mm offset
There's a chart on page 8 of the thread below that shows the offsets for different wheels. There's also good information on how to measure the offset you need.
If you don't have the correct offset, the wheels will either stick out from the fenders, or be too far inside them. If they're inside, you can use a spacer to get the right distance. If they're outside, it won't look right. Depends on how particular you are. You can probably find out which it will be by reading the link I posted above. Is there some reason you need to have this exact set of wheels, as opposed to buying some with the correct offset?
If you don't have the correct offset, the wheels will either stick out from the fenders, or be too far inside them. If they're inside, you can use a spacer to get the right distance. If they're outside, it won't look right. Depends on how particular you are. You can probably find out which it will be by reading the link I posted above. Is there some reason you need to have this exact set of wheels, as opposed to buying some with the correct offset?
I just found a set that I really like and a great price, I dont want it to stick out not my style but with a 2mm different would you really be able to tell?
17x9.5 front 18x10.5 rear wrapped in 265-40-17 & 295-35-18 Bridgestone Potenza RE760 now just need to wait 7 to 10 days and get c5 flags for them in red
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
wheel firment?
and get c5 flags for them in red 
