IMSA President John Doonan has teased further growth for IMSA’s GTP class in the coming years during today’s pre-Rolex 24 press conference. Doonan spoke directly about the potential for additional ...

IMSA president John Doonan says that GTP manufacturers tell him they want to hire American drivers, but where will those drivers come from? Being elbowed out by drivers who get their training in ...

signaling a shift of their Pro group to the GTP program. The most notable story here is Pfaff given the team’s recent news of financial troubles. A team that has been a staple on the IMSA grid ...

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 ...

IMSA has taken the unique step of placing its WeatherTech SportsCar Championship GTP field in a special impound immediately ...

IMSA President John Doonan said this weekend at Daytona International Speedway that 89 cars applied for entry into this ...

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.

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 ...