I'm taking a bit of a risk with this as it's often said that header wrap will cause headers to rust quickly. Given the standard Jet Hot coating that comes on the 4 into 4 headers, though, I'm hoping that the risk is slight. Because I want my engine bay to have a vintage look and my side-pipes will be painted flat black with BBQ paint, I didn't want to have the shiny silver headers being a focal point. I also thought that it'd look sort of odd with the silver pipes transitioning into black pipes at the flange. So, the choices were to have black ceramic added over the silver or add header wrap. I really like the old-school look of header wrap, so here they are.
I never put this stuff on before. If you do this, remember that you have to soak it in water first, then pull it very tight while wrapping. The result is something akin to a plaster cast when it dries. To get a good wrap, I did the first three pipes (from the front) with 36" pieces starting at the head flange (which only wrapped about 6" - 8" of pipe down from the head flange) then I used one long piece starting at the side-pipe flange and wrapped all four, then three, then two, then went to head flange on the last (rear most) pipe. I used just under one roll of wrap on each header, as well as 8 stainless pull ties per header (two each on the first three pipes, then one at the side-pipe flange and one on the last pipe at the header flange. Because the side-pipe flange is not covered by the wrap, I give it a quick scuff and spray of the BBQ paint before doing the wrap.
Word of warning. Before I soaked any of the wrap, I test fitted one piece on a pipe dry. This stuff is pretty nasty in that it's fiberglass based, so dry it makes quite a mess. Make sure you wear a mask/respirator, goggles, and gloves.
Photos available - PM me.