ceramic coated headers are not stainless. that is why they rust. they are cheaper b/c the steel in the header is not cheaper. a full stainless header will not rust at all. a ceramic coated stainless header would be the ideal setup if money aint a thang...
this is the reason a chikara steel header is so damn cheap and then the ceramic coated is more $, and so on to stainless...
so buy the nice stainless... it'll last longer, and it gets that sweet ace purply thing at the head... from the heat... i love that... like the hks titanium tip exh... ohhh yeeeah