Radical Cup North America returns to action this weekend as the championship heads to Sonoma Raceway for the second event weekend of the 2026 season, with a 21-car field set to tackle the next three races of the year in Northern California.Following a wild and weather-affected opening round at Sebring...

Record crowd for Rolex 24 followed up with another all-time attendance mark for the Mobil 1 Twelve Hours.

It's still a Porsche 1-2 in GTP, while the No. 27 Heart of Racing Team Aston Martin Vantage GT3 has retaken the lead in GTD.

It’s a 1-2 for Roger Penske’s Porsche factory team, with the No. 7 963 leading the sister No. 6. The gap between the two is under two seconds, and the margin to third is a reasonably comfortable seven seconds.

The No. 31 Cadillac Whelen V-Series.R has led from the drop of the green flag to the end of the first hour of the race.

Drivers Moisey Uretsky and Michael Cooper claimed their fourth IMSA Michelin Pilot Challenge victory Friday afternoon – and first of the season.

After a year lurking behind the scenes as a technical partner to DragonSpeed, Risi Competizione made its welcome return to the IMSA WeatherTech SportsCar Championship, back as a stand-alone effort with its signature No. 62 Ferrari, armed with Ferrari’s new 296 GT3 Evo kit.

Five-time IMSA champion Dane Cameron joins RACER Weekly to talk about Sebring’s unique challenge and the gloves-off intensity that takes hold when the sun goes down.

IMSA Hall of Famer Robert Charles “Bob” Tullius, a success on the racetrack and an innovator away from it, died Monday at age 95 in Port Orange, Fla. – only a few miles from Daytona International Speedway which fueled so many of his dreams and achievements over decades of dedication...

As Team Penske celebrates its 60th anniversary season, team founder Roger Penske has been named the Grand Marshal of the 74th running of the Mobil 1 Twelve Hours of Sebring on March 21.