in a previous post comparing headers to manifolds a major concern was with the header gaskets blowing. I replied to it about some gaskets i had gotten at R&D Speed in New Hampshire. I looked into it futher through them and the brand of the gaskets is BYSON.
http://www.byson.com/ I never had a problem with these gaskets blowing in 7 years on the same engine with headers. Just wanted to update you guys.