NASCAR and IMSA sports-car racing. They each won five. In earlier years, Porsche dominated the Rolex with racing versions of its famed street car — the 911. Last year, a Porsche-backed prototype ...

Off-season changes in GTD Pro division of the IMSA Championship promise to make ... will be joined by platinum-rated Porsche factory driver Klaus Bachler for the full season, a step up in ...

Increased opportunities are part of the rising tide created by the convergence of hybrid prototype rules between IMSA and the World Endurance Championship. The demand for drivers is fueled in part ...

Porsche boasts the mosts overall wins by far ... and both can compete in either WEC or IMSA. Le Mans Daytona h (LMDh): LMDh regulations mandate that a chassis must be built by one of four licensed ...