Audi's GT50 concept was built by apprentices and looks like an '80s IMSA racer for the future

The concept is based on an Audi RS3, complete with a turbocharged five-cylinder engine—it runs and drives too.

NHRA Countdown to Championship Shifts to Michigan Dragstrip

Surprise announcement that IHRA has acquired NHRA mainstay Maple Grove Raceway triggers scramble to replace playoff opener.