IMSA GT Championship

The IMSA GT3 Cup Challenge by Yokohama is a one-make racing series based in North America utilizing Porsche 911 GT3s.

The IMSA GT3 Cup Challenge by Yokohama features semi-professional drivers racing head to head in the largest single-make series in North America. Powered by one of the world’s most successful race cars, the Porsche 911 GT3 Cup car, the multi-class structure of the series teaches drivers essential skills for an eventual career in Porsche Supercup or the American Le Mans Series presented by Tequila Patrón.

The series is divided into two classes; the Platinum Cup, featuring the more powerful 2010–2012 Porsche 911 GT3 Cup cars, and the Gold Cup, which includes 2005½–2009 Porsche 911 GT3 Cup cars. Both classes race on environmentally-focused Yokohama Rubber Company ADVAN ENV-R2 racing tires.

In 2012, The Hertz Corporation announced that they would join the sponsorship portfolio of the series.

The series is sanctioned by the International Motor Sports Association, and is a support series to the American Le Mans Series.