Ceramic coating will continue to cure when first run, but you don't want to put too much heat into them.You don't want to run freshly coated headers on a new engine that is still breaking in. New engines develop a lot of heat as parts develop a wear pattern.Same if you are working through some tuning issues. A lean condition causes excessive Exhaust Gas Temperature (EGT).Best case is to break in and get your tune worked out before coating your headers or run an old set of headers.
Just spit on it and shove it in.
Had i known ceramic coat was so sensative to tuning issues, i would have just blasted them and shot them with vht. I guess i just wiped my ass with 275 bucks because of a carb float!! Sucks!! LolSent from my MB860 using SoCal Jet Boats mobile app