c5 or c6 calipers.

[Apogee]

i doubt i could use the z06 parts then as i only have 17" wheels. i guess i'll go with the c6 parts. thanks!

De nada. With 17" wheels you are going to be limited to the 325mm [12.8"] C5/C6 rotors, but make sure you double check your wheel fitment with a template if you've already got the wheels. You can download free templates from here: http://www.kore3.com/tech.php#fitment_templates