Installing Z06 18x9 Rims on a 3rd Gen. Camaro. What tire size? What size adapters? Any modification needed on fenders or Suspension?

 

Z06 wheels are available in 18x9.5" 7.6" backspace and 18x10.5" 8.0" backspace. Either size is almost too deep for a 4th Gen. You need to work from the backspace indicated above to figure out the correct spacer for a 3rd Gen. I know the typical 4th Gen wheel needs a 1" - 1.5" spacer to fit on a 3rd Gen, and with these deep wheels you might need something even wider.