For my actual headers, I went with a newer copper-based version. It "cures" into a pretty rigid layer over them. Definitely cuts the heat transfer down to nearly nothing.
For my intakes, I have a generic header wrap on them plus DEI Reflect-a-gold foil over the outside. I put this on before I was able to get the headers wrapped and it definitely made a difference, but my filters are outside the engine bay. On a short ram setup, I don't see it making much of a difference at all, as the air being ingested is still going to be very hot, it'll just heat from the inside out rather than the other way around. (or both)
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