I took it that this was what you were meaning even though I didn't say anything. I use Solidworks to do all my 3D modeling and have several CAD/CAM software packages I use to create and machine my parts with. I have always liked the factory exhaust/intake setup and how it fit together to heat the intake. This type of design will undoubtedly create the best niche since it can incorporate the stock exhaust and not require a user to have to replace it just because they change intakes.
