Black 1" would look awesome! Not an 8 but this gets the point across...
just so you know, my experience is that pn a naked bike they stay black like that for about a week with heavy riding. they catch all sorts of dirt and fun stuff and become rather stained. I saw a thread here, wrapped my headers, then they ended up looing just as ratty as my dirty headers so I took them off. just my humble opinion
The best bet is to get them ceramic coated by a reputable company but make sure they do inside and outside to get the full benefit of protection and performance.
what is the cover under the headers called please!!!