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There is a company that sells brackets that will adapt the calipers. You need to use the C-5 rotors and they are supposed to work. The Z06 calipers are red but are the same as the regular grey ones. Zips sells the full kit for about $1000. It is supposed to be a killer Mod. I am planning on doing this myself this summer. If you buy the brackets only they are about $400. I thought they were from Electromotive but I can't find the link. Seems like a rip off price.
Good luck, DON M
No you can't. C5 rotors are 1.25" thick. C4 are 1.1" thick. The C4 calipers will not fit around the c5 rotors. You can mount the calipers but you need the electro-dynamics brackets to hold them or the bracket kit made by vette brakes that is in the Zip GP. The upgrade to C5 will cost you about $700 in total for all the parts. Definitely worth it for people without the big brakes. For you, you'd need to judge for yourself. Lastly, the rear C5 don't fit at all. The E.D. people were putting together a kit to allow the C5 to work but the C4 rear is actually a better brake.