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

Last week, ahead of the annual Rolex 24 at Daytona and the start of the North American road racing season, IMSA (the sport's ...

From the unmistakable shrill howl of the four-rotor 1991 Mazda RX-7-001 GTO to the thundering Chevrolet V-8 growl of a 1985 ...

Unusual shows of passion, non-traditional viewing platforms added up to a winning Rolex 24 for the glass offices at IMSA.

a wealth of well-prepared prototypes and GT cars have entered the Rolex 24 at Daytona, which gets the green on Jan. 25. The demand to fill the seats in the IMSA WeatherTech Championship’s state ...

The sister No. 9 car will be piloted by three-time FIA GT World Champion Marco Sorensen ... on February 28. In IMSA, Aston Martin will field just one car that will be driven by long-time factory ...

Aston Martin has partnered with The Heart of Racing (THOR) to enter the Valkyrie race car, built to meet LMH regulations, in the premier Hypercar and GTP classes of the respective FIA World Endurance ...

Six-time IndyCar champion Scott Dixon and MSR IndyCar driver Felix Rosenqvist are the endurance drivers in the No. 60, while ...

The production of the Aston Martin Valkyrie hypercar wrapped at the end of the year to make room for the Valhalla model, but ...

Starting at this weekend's Rolex 24, more classes — and cars — will use special sensors to help IMSA maintain an even playing field. Here's how they work.

Representing IMSA's vast GT categories is James Sullivan ... "So for 2020 and 2021, we had an IndyCar program and we had the Lexus sports car partnership at the same time. And I will tell you, and ...