This is my first post ever on any forum, so forgive me if i make any mistakes. I just recently bought a 09 Z Touring Black on black without nav with Bose.
The factory bose tweeters produce terribly highs most 2.5 inch speakers dont do a good job as woofers or as tweeters, so this is what I made.

Then printed it

Then assembled using 1 inch tweeters which in my opinion outperform 2.5 inch tweeters.

Results.

I'm not sure if anyone is interested in these but I can print them if anyone else needs them. Just wanted to share. These tweeters really made a big difference in the highs that i feel the bose system lacks.