Mob have you ran a set of headers that have been ceramic coated?
YES
not on the Concours, but on other bikes. It will make zero difference on the jetting needs of the Conni.
I have also seen a few different companies coatings, which are all essentially the same.
You will see a major reduction in heat inside the fairing, but it's relative, and I would say a good way to describe it is "perceived airflow temps" will be about 30 to 50% less than what you feel from untreated headers.