re: 3D printed induction coils I was wondering where the induction coils would be used in a car and it looks like induction hardening. newsletter.ghinduction.com/newsletter16.1/wp-content/themes/blankslate/pdf/articulo_3.pdf GH Induction, leading manufacturer of heat treatment machines for automotive transmissions parts. https://en.wikipedia.org/wiki/Induction_hardening Induction_hardening