You have a lot of options are far as the exhaust goes. Youre going to either have to listen to the different brands on youtube or in person if you have local meets. Each one is literally different and it depends on your tastes. They have straight pipes and then they have silent exhausts. Are you looking for just a catback or a full turboback right now? (Downpipe + catback)
There are two options are far as tuning goes. It depends on your experience with tuning a car. If youre new to tuning, the the Cobb Accessport is your best bet since its so simple to use and ease of access is a breeze. Its very straight forward. If youre a more experienced user then the other option is a Tactrix cable and a laptop. It all depends on your experience so we will wait for you to respond before we dive deeper into that aspect.
These cars are super touchy when it comes to mods (in exception to a catback since it doesnt alter much flow) but for example an intake, a downpipe, ect. Everything you change requires a tune for optimal safety and the security that your car is healthy and will not get damaged.
The cobb accessport has a few "stages" of performance with an OTS (off the shelf) tune thats pretty generic. For example if your car is completely stock, you can flash over to "stage 1" for a better tune since the stock tune is so crappy. "Stage 2" requires a downpipe and a catback (turboback exhaust) and it has a significant increase in power. Again thats all based on your user experience with tuning.
Definitely take it slow and do your research so you get the best positive experience with your car! :tup: