In this episode we talk about the design, engineering and testing of race cars. I have visited Toyota Motorsport earlier this year and talked with Alastair Moffitt and a few of his colleagues. We start out with an introduction to TMG (Alastair Moffitt), then talk about component and full-car testing (Marco Gehlen), and then discuss wind tunnels and aerodynamics (Antonio Pavesi and Rene Hilhorst). We also cover design trade-offs, team/driver integration, the role of the driver during development, the cockpit, the elements on the steering wheel as well as testing. We close with a look at additive manufacturing (3D Printing) in TMG's work.