3D printing, also known as additive manufacturing or rapid prototyping, provides a number of advantages over components produced by CNC machine work. The latter necessitates a significant amount of time and thought in order to develop the milling process. Most significantly, when you're not cutting shapes from surplus material, as you would with any CNC system, material costs drop dramatically. However, forged carbon fiber, which is the most common material for current rapid prototyping, lacks the strength-to-weight ratio required for most automobile components.