Hey Ken,
When I bought my Z06 from the original owner he had installed an SLP Blackwing CAI. He gave me the stock system in a box. I can't tell you much about the Blackwing since I have never driven the Z without it, but it sure is impressive with it.
But, I will tell you that most CAI systems that are installed without a tune can give the 'puter a lean condition and kick a code and Check Engine light under certain situations. I have never had a problem driving normally on the street, even with an occassional throttle stomp. I have also run my Z06 at some HPDEs at Pocono, Summit Point, and Road Atlanta without an issue. But it seems that every time I autocross the car, which is only once or twice a year, I will pull a lean condition code in the DIC and get the dreaded Check Engine light. Not a big deal to clear the code, but I really think that with the CAI, the hard acceleration and quick lift required at autocrosses puts more air into the system than the stock program likes. I am sure some of the guys on this board that are much smarter than I about tunes and CAIs, can give you more information.
BTW, your Z was made for a little off street racing! Good luck with your search.
Rich