The roar of the engines returns to the Irish Hills this weekend as NASCAR makes a stop at the Michigan International Speedway. Today is a practice day for NASCAR Nationwide Series and NASCAR Sprint Cup Series drivers along with qualifying and the finals for ARCA Racing. Tomorrow, the 250 mile NASCAR Nationwide Series race will take place. The weekend ends with the NASCAR Sprint Cup Series Quicken Loans 400 on Sunday afternoon. Defending champ Greg Biffle, Dale Earnhardt junior, Tony Stewart and Jeff Gordon are expected to be in the field for this year's race.