ok i was looking at headers and the first one that comes on ebay has this description.

"100% GUARANTEE BRAND NEW

FOCUZ MOTORSPORT DEVELOPMENT

Ceramic Coated

Increased up to 15 hp!

4-2-1 Lightweight Design

CNC machined flanges

Comes with the flexible pipe

Fit to HONDA ACCORD 1998-2002 V4 EX

No instruction included, some items need professional installation. "

V4?????what the hell? Am i wrong here? I hate ebay

by the way.
Is OBX a good brand Header... what is OBX?
Whats a good brand header?

dont kno about ur ebay question but from what i am hearing OBX is a junk header. They will still give u slight gains but i hear their new design doesnt work as good. DC and the Chikara tork stepped header i hear is really good for gains. thats my 2cents

I can't really respond with an useful info as to your original question, other than I think 15hp is a bit of an exageration.
That said, I can tell you my experience with Hedman/Chikara headers. I put them on my 90 Accord. The gaskets they gave me didn't even line up correctly. I had to have my originals grinded, this in turn led to exhaust leaks on both gaskets within 200 miles. I got replacement copper gaskets that worked great. But just be aware that there were fitment issues with this brand. I called a local Honda racing/repair guy around me, and he said he had done 3 or 4 of the same headers and had similar problems with all of them. They work, but fitment issues seem common. Don't know if that helps, just my .02

thanks. so basically talk to the local area honda tuner and see what he says about the brands. good call i guess.

Well, here is just as good a place as any...I would do a search in this forum for header brands. I know it has been addressed multiple times. And they had more responses on those threads. That will point you in the right direction.