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 Lola Corvette GTP, the winners of the inaugural Historic Sportscar Racing ...

After 10 hours of running on Wednesday at Sebring International Raceway, Porsche Penske Motorsport’s Mathieu Jaminet set the ...

Coming off his IMSA WeatherTech SportsCar Championship debut at the Daytona 24 Hours, Honda factory driver Kakunoshin “Kaku” ...

IMSA has many classes, depending on the series. Its main series, the WeatherTech Sportscar Championship, has four classes: Grand Touring Prototype (GTP), Le Mans Prototype 2 (LMP2), GT Daytona Pro ...

Penske also returned to IMSA in 2017 with Acura and later switched to lead Porsche's GTP program, which won the 24 Hours of Daytona and the GTP championship last year. Like Brown and McLaren ...

It's also the only production-based car in IMSA GTP, the only car with a V-12 in either series, and the only car built by a major manufacturer without a hybrid system in either category.

It is the debut year for the program in IMSA sports car racing, but series president John Doonan ran a similar STEM experience when he was head of Mazda ... with the IMSA GTP Hybrid Electrified ...

It is the debut year for the program in IMSA sports car racing, but series president John Doonan ran a similar STEM experience when he was head of Mazda. It took sponsorship ... with the IMSA GTP ...