I had my cantrell headers and exhaust ceramic coated and the highly unscientific test is I noticed my trunk and engine bay temperatures seemed cooler than with the stock exhaust system.
It's too much of a PIA to install header, run without coating, measure temperature, then remove header, coat, reinstall and then measure temperature.
Much easier to find a stock NSX and measure temperatures against...maybe on the next get together here...
I think the cat's may run a little hotter now if the ceramic coating keeps hot exhaust temps in, then the catalytic converters will see more heat.
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George
It's too much of a PIA to install header, run without coating, measure temperature, then remove header, coat, reinstall and then measure temperature.
Much easier to find a stock NSX and measure temperatures against...maybe on the next get together here...
I think the cat's may run a little hotter now if the ceramic coating keeps hot exhaust temps in, then the catalytic converters will see more heat.
--
George