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must be a PCA thing. i never had little things like coatings cause rules issues or get challenged because of them.
i ceramic coated my header on the blue 968. under hood temps dropped measurably. it seems that oil temps did too. of course no change on coolant temp.
i went to Engineered Applications, arguably the best ceramic coater out there. that's who the header companies go to (like hooker and hedman). $175 and 2 days to do it. great job. still shiny after many high temp runs. they guarantee the coating for 1 year.
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