The coating last awhile on cast iron ,it does good on headers if you sand blast before coating. I had the covers on my maniflods,turbo pipes and turbo housing to keep the heat out of the bedroom. Ceramic coating should help with rust the blankets cause ,I never could see any difference in performance with the blankets off or on with my 8V92 in my Eagle.The after cooler under the blower really sucks on a 8v92,I did away with my 3 pass cooler and went to the 5 pass cooler and could tell the difference, I wished I had the space and I would have tossed it and went with a intercooler like we did on Don Smith's 8v92 it really came to life and ran cooler