There are numerous CAI's out there and some need a tune, some don't so decide what you want before you buy. I have an AEM that takes no tune. Nice aluminum intake and an open filter. Was on the car when I bought it.
Sound is a hard decision. Mine has 40 series Flowmasters....not my choice but not bad. Again, on the car before my owning it. Some drone plus on the Vert, things are a bit more noticeable. Try to find some local cars like yours and listen....most of the online sound tracks are off compared to real life. Check a good local shop for exhaust work. They can be reasonable at times.
Panama City, Fl.
I wake up in the morning with nothing to do and by supper time, I have half of it done.
2000 Lightning, s/c, tuned, Basanni, built tranny
Sold them all.....
Previous Mustangs:4 - '66 Coupes(silver/blue/grey/red) '87 GT HO, '00/'02/'07 GT Vert(red)(grey)(black), '68 Coupe, '11 GT/CS, 08 GT Vert