Hey C5Rick, I have an 07 convertible w/BB Bullets on them. Here's a small video clip to listen to:
http://www.youtube.com/watch?v=5vlYD_gLdro#GU5U2spHI_4
I had the Bullets on my 01 and 04 convertible 6 speed cars and loved them. Very aggressive, slight drone with top up ( but who drives with the top up?) @ 40-45. Sweet music when up shifting especially when you lean into it and great sounds downshifting; like a C6R, loves to burble and pop!!!
NOT FOR THE FAINT AT HEART!!!
BTW: AJUSA.com online carries them for $895 plus Free shipping to your doorstep. If you have access to a lift, it takes about an hour to swap them out!