I have several mods done to mine but it is a Gen 2....there are no mods for the airbox other than installing an aftermarket filter...I am a K&N guy but as you hang around and read more on the site, you will note there are many, many differing opinions on many, many aftermarket items and mods...
There is a whole section on the Gen 3 and the mods owners have done....it is pretty extensive too..
You have an exhaust system so I would naturally assume you have an aftermarket air filter as well-the two normally go hand in hand.
Lots of members are flashing their ECU and some are adding aftermarket velocity stacks..
There are a lot of posts on some of the issues members are having with their gen 3s....quick shifter issues, brake issues, etc.....