I recall reading a while back to make sure your header flanges are even or sanding them down for a perfect flat surface. It sounded like a good idea, but thought, am I going to ruin the ceramic coating if I do? It looks like I will, and end up chipping it or screwing it up. The flanges are pretty smooth and even, but there's a few tiny grooves and pits. It doesn't look like it'll show up as a leak after install, but I'm not quite sure.
Thanks in advance for any advice.
Thanks in advance for any advice.
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