Thinking of installing a CAI (maybe K&N) on my 2012 SS. Any opinions on it? Any noticeable difference in sound/performance? Thanks.

 

I would preferably look into Volant. I have used them for my Silverado 1500 and my 2500 Duramax.
They are the only one with the scoop that actually draws cool air from outside instead of hot air from inside the motor compartment.
Just my thought