I have a air intake filter that looks different from all of the other cars like mine, it is a lot smaller and taller. I looked on the internet to buy a replacement one,and found out that these air intakes were put on in 11 states only, and that it has some kind of trap oxidizer, what is that? What does it do? And should I just buy a replacement filter, or would it not hurt to put one of these performance air intakes on my 300D Turbo?
http://wade************************/diesel.html

Thanks!