Hexxon
Heres the pictures of my runners and trumpets. Pay notice the textural differences on different parts of it as an example. This is a early version, in the final version there will be some fabrications on the contact surface with the plenum box, to ensure radiused surfaces everywhere inside the plenum, no sharp corners. 200 hours or so in total will be required for the final version.

The piece which the pictures display has been totally reworked on all of the surfaces being internal. All of the surfaces has been smoothed out and reformed where there was gain in doing so. The basic surface smoothing, that is, making sure that no nasty bumps and holes are present (such as relics from casting), is performed to eliminate turbulence inside of the intake, optimizing the volumetric efficiency of the engine at ALL revs and loads.

The trumpets were then polished to further remove turbulence, but the part of the runners where contact with fuel is present was left with a rougher texture, to optimize fuel atomizing. All of the inside of the plenum will be polished when finished actually.

The runners were reformed to suit the characteristics i wanted in my engine, theyre bigger in the cross sectional area as you might have noticed.