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The difference between the ceramic and stainless headers RE performance are negligible. It's more about weight savings than anything else.. and those aren't that much. As part of a bigger program though.. the only header and exhaust combo I've seen dynoed to make a difference is the Mugen, and that wasn't a lot - depends on your budget. If you're JUST doing exhaust and header for power, you're probably wasting your money. Go FI or upgrade cams (Type-S, Crower Stage I) and get Type-S pistons first.
The crap is caused by bits of oil and other junk getting over the header, which gets very, very, very hot. Even fingerprints will mess it up. To prevent this, just clean it with alcohol every now and then. I suspect giving it a good polish with Mother's or 3M metal polish (and then cleaning with alcohol) will also help.
I absolutely love the golden glow the SS headers get over time.
Steve
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...don't panic
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