I bought and installed this intake myself, installation isn't that hard if you have the right tools for the job and it does come with two air filters I just wish they were washable. The performance I have not noticed to much of a difference but I have not put it on a dyno yet but I could definitely tell my car breathes a lot better now.
K&N #2582 Intake Review
Overall a good package, easy to install. Under normal driving conditions there is no difference in performance and it is no more noisy than stock. When the skinny petal is pressed it does get noisy, like a four barrel kicking in, I personally like it. Next step is to get the air out as efficient as going in to complete this package, then I would expect a slight increase in mileage and performance.