i would just get an used name brand header in case you decide to make some hp. you can find some just as cheap as the ebay ones, and better quality. or you can wrap you stock one to hide the rust and it might even lower your underhood temp. i wrapped my dc 4-1 headers to hide the rust and i love the way the black wrap looks on them.

pluss 4-1 flows a little better than the 4-2-1