If you're looking at "cold" air intakes for performance, there really isn't much of a gain to be had for the cost. A lot of people are just buying a K&N drop in panel filter for the stock box.
But, the aftermarket options do add some turbo noise, not a lot...some
K&N system not recommended
Windstorm/Airaid adds a nice little sound but needs easy mod of foam to seal to hood better (what I run).
MDesign has best look and a little sound addition. When I tested it the only thing I didn't like was how the IAT1 sensor fit into it.
Suspension, pretty sure your only option for the '13+ is H&R. I have an '11 with coilovers. Seeing as no one has shared a pic yet, this is with coilovers not lowered all the way and is pretty similar drop the the H&R'S I think.
Sent from my SM-N920V using Tapatalk