remflex.com Eh Eh, there are expensive, but man are the good and my exhaust header bolts do not lossen up and require re-torquing. I've tried all kinds of other gaskets, nothing worked on MY motor. I went with straight copper exhaust gaskets, high dollar, they didn't work either. Before, everything would burn through somewhere. Not Remflex!
http://www.remflex.com/