It's called the Super Weekend, and for good reason. Four different racing series are taking laps at the Indianapolis Motor Speedway on the oval and the road course.
NASCAR joins the Grand Am series action that began Thursday. It's a busy day for drivers and track workers.
Jeff Gordon's 24 car is just one of the 181 cars that will be on the track at some point Friday - either on the oval or the road course.
Sprint Cup practice finished up at 1:00 pm. Earlier Friday, Danica Patrick - the only woman to lead the Indy 500 - was signing autographs along with other drivers. Now she's back at the Indianapolis Motor Speedway as a NASCAR Sprint Cup rookie.
Local favorite Jeff Gordon is trying to become the first five-time winner at the Brickyard.
"It's a very challenging race track. It can be your best friend or it can be your worst enemy. I'm blown away we have four [wins]. I think when you look at the names that have wins here it's an impressive list. I would certainly like to separate myself and be a five-time winner in our series," said Gordon.
"Anybody who wins here gets to put their name along a list of names of legends, not only in stock car racing round but also open wheel and all kinds of other different series," said Dale Earnhardt Jr. "There's a good amount of Indy to the guys that have won this race before...more so than I feel at other race tracks that I haven't won at."
It's the first time for the IMS to be used as an oval and road course. Friday afternoon will see two Grand Am races including the Brickyard Grand Prix.
Watch a Brickyard 400 special on WTHR Channel 13 on Sunday, July 28th from 5:00 am to noon.