[JFWJR179]

Originally Posted by I call it Vera

Did you see this?
http://www.camaro5.com/forums/showthread.php?t=225661
I don't think it will work with a ZL1

You are right, I just tested the 18 X 4 spare tire donut on
my ZL1. GM part #19257799

The 18 inch wheel will not clear the front Brembo brake.
It would destroy the brake caliper if it was torqued all the way down.
I am returning the spare tire kit for a refund.
apparently GM does not make a ZL1 spare tire donut.