there is a reason that there is no headers for the 04 v6, is because the manifold is made into the cylinder head.. that meants ther will NEVER be a header on a 03+ 3.0vtec v6 motor!!! even the new accord v6's have the same design.. 
 
u can see alittle hear
 

but u can really see it here
 
 
i read about it a year ago or so, when they were saying that the accord was growing up..