I'm putting together an engine using Cast Exhaust Manifolds, Max Wedge to be precise, as I want the build to have that look. I know I could get better flow with a set of headers, but was wondering if anyone has tried "extrusion honing" on a set of these ? I was hoping to smooth and increase the flow somewhat, and possibly lighten them weight-wise also. Any F.A.S.T. Racers, or anyone elses input is welcome...Thanks