Excuse the redundancy if this has been covered, but I'm curious as to the value of heat coating headers. HPC who does a lot of work on IRL and CHAMP cars is located near me. They maintain that their product (which would entail coating both the inside and outside of the headers) will significantly reduce engine bay heat as well as allowing the gases to escape with less friction etc.etc. While it sounds plausible, I wonder what the practical effect would be. Any thoughts? On the other hand, for $185.00, I don't think it could hurt!!