I just swapped out my air filter yesterday. All you need is the screws to keep the air box cover secure.
If you are looking to clean/change your air filter, I would recommend the following:
http://www.ebay.com/itm/K-N-KA-2508-...826c69&vxp=mtr
These filters are much better than the stock air filter that you have in there. They provide much better air flow and performance.
If you need help installing it, watch this video:
http://www.youtube.com/watch?v=UaGndC1s5wU