Detroit Speed's How to Build a Pro Touring CarThe photos in this edition are black and white. Trends in automotive modification come and go; some are outlandish, some are practical. Currently, the trend is Pro Touring. While it's expensive, it definitely leans toward the practical. It was originally a name used for GM cars, but "Pro Touring" has come to mean a style for all cars from many years. It is essentially the art of adding modern technology to aged designs to create cars that start, stop,