Inliners International Forums General Discussion Hi Performance New Guy Here. 68 Camaro with an L6 250.

I think Tom also tested the cast iron headers vs. tube headers on the 292 as well, because Tom Langdon was on hand during some of that dyno session. And he saw that in most of the street driving RPM's the cast iron Langdon's exhaust performed pretty much neck and neck with the tube headers up to a point.