This Honda-swapped Miata manages to run with a 600-hp Audi R8.

Here we see big power isn't easily used at The Ridge.

All-female team finish fourth overall at Thunderhill 25.

Audi R8 LMS GT4 caps a highly successful first season.

There is a wide variety of tin-tops, muscle cars, and prototypes filling the ranks at this year's 25 Hours of Thunderhill.

The class winners will need the right combination of speed and consistency to succeed.

In just their first trip to Indy, Big Diehl Racing showed established teams how to race a TA2 machine.

With a smart setup, strong tire management, and a careful read of traffic, they fought their way to the top.

Roger Eagleton takes this 3,400-lb Spec Mustang by the scruff of its neck around Sonoma Raceway, logging consistent laps in the 1:53-range.

With careful oversteer, he pivots the powerful car at high speeds.

The Ford Chip Ganassi Racing teams wrapped up the IMSA season at Road Atlanta.

The Ford GT brought home the GTLM Manufacturer’s Championship for Ford.

Corvette Racing came to the final round of the IMSA Weathertech Series looking for the drivers and team titles. Only one car could prevent them.