The K&N is an overpriced peice of junk. You would be saving a loty of money and getting the same results by just running a cone off of the MAF (yes you can do that very easily even tough it's an 04. If you have ever took one apart you should know)
You options for a FWI or cold air intake is the intense (wich is also overpriced for what it is) or a custom made one that is made out od PVC pipe or something like that.
But other than what is mentioned above that's all for the 04 and up's