I am thinking about getting an ebay header too, let me know how it goes.
In theory how hard is it for these no name brands to copy the design of a name brand header like dc. I mean if they use the same steel, gett the inner diameter the same and the same shape of the tubing on the inside the same, then they should give the same gains as one like dc. Now i realize they may use cheaper materials or welds that are not as good, but really for the most part steel is strong, and welding really doesnt seem to be too hard to do a decent job of.
I dont know, just my thoughts on an ebay header, so far it seems that people that have them seem to not have any more probs than people with name brand ones