Reply to "header insulator"

If by "heat insulator material", you mean some type of header wrapping, be aware that those wrappings will cool your engine bay while vastly inctreasing your header tube temps, to the point where the steel in the tubes will oxidize, flake off and untimately burn through. A secondary problem is the physical expansion of the steel tubing under the 1600+ F degrees it will see- cracks and broken welds may occur. Finally, even if done correctly, it looks like an military battle-dressing done under fire- not very neat! I suggest checking with Jet-Hot Coating Corp. This ceramic coating is done INSIDE and OUT, which smooths the innards of your pipes for a reported power gain while protecting the steel from oxidation, and can be had in a variety of colors including almost-chrome. It is a 3-day turn-around, is not enormously expensive and its guaranteed!