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IMSA's GTP class is attracting more manufacturers, more fans

Related Topics: IMSA, John Doonan, Zak Brown

The International Motor Sports Association (IMSA) is having a moment. Buried for decades behind bigger and more-popular racing series, the Florida-based IMSA series is fighting back -- and gaining ground on its closest rivals.

The momentum is building at the right time, as it heads into this weekend's 24 Hours of Daytona -- its grueling two-day-long Super Bowl -- which launches a season of 11 races that run through October.

IMSA was formed in 1969 by NASCAR founder Bill France and the husband and wife duo of John and Peggy Bishop as a nationwide sports car endurance racing series to complement the burgeoning-but-regional stock car organization that dominated the South.