NASCAR officials felt the splitters were so close to being non-compliant that they had the Penske teams replace the splitter in order to lessen the likelihood of the splitters being out of compliance following the race. They also impounded the splitters to take a closer look at them this week, and NASCAR determined there were no issues. A splitter affects the amount of front downforce for the car.
Logano finished seventh, and Keselowski finished ninth at Michigan.
The teams of Keselowski, AJ Allmendinger and Dale Earnhardt Jr. did receive written warnings for having to go through pre-race or pre-qualifying technical inspection three times. It was the teams' first warning under a new system where if a team gets four warnings between now and the end of the season, it will choose its pit stall last instead of where it qualified for the next race.
Earnhardt will miss 15 minutes of practice time this week at Bristol because his car actually didn't pass pre-race inspection three times Sunday. Also losing practice time this week are Paul Menard and Josh Wise for being late to the inspection line before qualifying.