TTI Header “ break in “ thoughts

I would contact the header and or the coating company and follow their recommendations. Ultimately they are probably looking for a certain temperature and cure time. Might be better to take them to a powder coating place that has an oven big enough for headers so the time and temperature can be done in a controlled environment. I don't recommend doing it during engine break in unless you have to. Your first priority should be the engine during break in. You don't need the distraction of the headers during this time. But if you have to make sure your timing is correct (not retarted) and have some fans at the ready that can be directed at the headers to help cool them if needed. Also a way to measure tube temp. Keep in mind infrared promoters don't work on shiny reflective surfaces. Good luck!