Building Custom intake manifolds

[D Rock]

From what i've seen on here quite a few guys have some serious fabrication skills. I was just wondering why more people don't build custom intake manifolds? Is it because the flanges are hard to come by? getting around the cooling system? I am specifically interested in a intake like mike morans quad turbo camaro.



obviously its made out of a set of headers, is there alot more too it then what i'm thinking?

Derek