By 1998, both sisters were PSGKA Gold Cup winners in the "Junior Piston Port". Both sisters split seat time in 2006 at the ARCA Re/Max Series at Berlin, Gateway, Chicago, Milwaukee Mile, and Toledo, Ohio. By 2008, the twins qualified for the ARCA Re/Max Series at Kentucky Speedway, with positions 8 and 15. They finished 10th and last, respectively. Amber's career victory came in the third race of her career, which was also the first Gold Cup event held at Portland (Oregon). The 18-year-old from Prineville, Oregon defeated Kristi Miller by 0.3 seconds at the World Center of Racing. This was also the first Gold Cup win for PSGKA Auto Sports, who have gone on to win multiple races each year since their debut in 1997. Including Amber's victory, all five Gold Cup events have been won by women drivers. Four of the victories have come in the last five years. The only other woman to win was Janet Guthrie, who captured the inaugural event in 1996. Guthrie went on to become the only female driver to ever win the Indianapolis 500, doing so in 2001. Of the 12 women who have competed in the Gold Cup, eight have won at least one race during their careers. The others who have won include Janet Guthrie, Sarah Fisher, Tina Harvick, Vickie Arley, Jennifer Holloway, Katie Huttman, and Kirstin Olson.