duplicolor ceramic high heat
is a blessing from god. I put 4 coats of it on my headers and have been baking them today and such (while on the clock at work. lol) and when I was testing them with the radiating oven the internal temps of the header were 170degrees when the outside was 255. that was amazing to me. that beats out almost any regular ceramic coating. (note: I did bake them for 1 hour at 450 degrees in an industrial oven for baking the paint on) the test I did to get those numbers was 20 mins in the radiating oven (primarily used for melting plastic to specific heat) and the used the laser temp thingy( can't remember the name of it but year) and shot it inside them and outside and got those numbers. after 20 mins it should have been the same all the way through if not interfered with on regular uncoated header. and I'm going to test the other one before and after baking as I'm waiting on the test on the other right now( 10 mins)