lots of guys on ffcobra like them. Earl's has a header gasket that uses a similar expanded graphite material, but it's in an aluminum carrier. If you replace the headers, you can just replace the inserts in the carrier. I have one of the first sets of FFR 4-into-4 headers and the flanges and ports are HORRIBLE. The Earl's gaskets were the only ones I could find that would seal them up and they've NEVER leaked.
