I run an Airaid drop-in in my 07 Tahoe and it works great. IMO it filters better than k&n, is really durable, but still flows well. They use an extra Layer of gauze to cut down on all the bigger holes that you usually see on k&n's.

It is an oiled filter, but I just pull it, put in my old stock one for a day while I clean it, than swap it back in. When you use the aerosol spray its really easy.

I have about 50,000 on it and cleaned it twice so far. Check out their site for more info on how they're made, they have some pictures of the layers they use.

 

This is the cheapest and flows the best IMO....

 

k & n here. always been using them... now im going to get one for this truck too. drop in.

 

 

Next filter i buy will be a dry flow AFE or S&B . Im tired of oiling too.