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 ...

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

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.