Welcome to the Z!
I moved you post to its own thread - it will get more exposure here....
There are several different routes to take, depending on your end game and wallet size.
A catch can is not required, nor will you see performance gains, but s highly recommended.
Check the R/T Exhaust section for info on different exhausts. Deleting the resonators, are a quick way to make the exhaust more noticeable, but the associated drone can be annoying to some. Cat back get expensive. That said, the most popular are the Solo exhaust, Corsa and Zoomers. Others will chime in on their preferred options.
The addition of a cold air intake will also change the sound.
Performance wise there are head/cam options and several supercharger options. Superchargers can bring you into the 500 RWHP range.
BTW- these cars kick ass standing still....Enjoy!