Having attended both F1 and IMSA races, I found some distinct differences, and you might be surprised at what I discovered.

Yes, Hendrick Motorsports once ventured beyond the oval tracks and into the world of IMSA sports car racing. So ... took a bold gamble in IMSA’s Grand Touring Prototype (GTP) series.

Not all those 13 GT Daytona Pro cars will be racing with IMSA for the whole season—there are two Corvettes listed for Daytona, for instance, but one of those cars will be racing full-time in the ...

In 1988, Audi won the Trans-Am Series, in 1989 the Audi 90 quattro was the dominant car in the IMSA GTO ... the Audi R8 GRAND-AM celebrated a GT victory in the 24-hour race at Daytona (Florida).

The Rolex 24 will be highlighted by some of the stars of tomorrow, but the weekend will take a step back to honor the past cars of yesteryear in a 30-minute race. While the IMSA WeatherTech ...