The stovebolt engines do best with longer tubes of relatively narrow diameter in high performance applications. I don't know what you are looking for, but mild steel tubes will burn out in a couple of years. If you want them to last you want stainless steel (which I have not seen commercially available) or ceramic coated headers.

I think you will be much happier with the fit of Fenton or Stovebolt cast iron headers. Unless you have done lots of modification to the head they will flow plenty. They will also outlast the engine. My inline 6 BMW has similar cast iron headers from the factory and they work well.


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