The 2015 Pinewood Builders Challenge, previously held every summer during SEMA’s Installation Gala, featured two major changes. Five of the nation’s premier custom-car builders crafted miniature pinewood hot rods that raced head to head last August at the National Street Rod Association (NSRA) Street Rod Nationals in Louisville, Kentucky. In addition to the Builders Challenge, a Manufacturers Shootout was held for the first time ever for eight participating members of the Hot Rod Industry Alliance (HRIA).
https://www.sema.org/sema-news/2015/12/mini-designer-hot-rods-take-to-the-track