I've had my 09 GT500 for a week now. The person that had it before me had installed a Ford Racing CAI and Axel back. I do not know if it has been tuned or not. It didn't come with a tuner or any paper work besides the original window sticker. From looking through countless threads, it looks as though that CAI must have a tune. 1. how can I find out if it has been tuned or not 2. If it hasn't been tuned, what can happen? This is going to be my DD for the most part. And I plan on doing a gear swap and changing the pulleys in the near future.