| Monster Energy NASCAR Cup Series | |||||
| Infraction Date | Track | Team | Level | Infraction | Penalty |
| 6/10/2018 (pre-race inspection) | Michigan | No. 20 | L1 | Sections 20.4.3.a: Splitter Note: Splitter did not meet rule specifications. | Crew chief (Chris Gayle) has been fined $25,000. Car chief (Jason Overstreet) has been suspended from the next Monster Energy NASCAR Cup Series Points Event. |
| 6/10/2018 (pre-race inspection) | Michigan | No. 18 | L1 | Sections 20.4.3.a: Splitter Note: Splitter did not meet rule specifications. | Crew chief (Adam Stevens) has been fined $25,000. Car chief (Nate Bellows) has been suspended from the next Monster Energy NASCAR Cup Series Points Event. |
| 6/10/2018 (pre-race inspection) | Michigan | No. 11 | L1 | Sections 20.4.3.a: Splitter Note: Splitter did not meet rule specifications. | Crew chief (Mike Wheeler) has been fined $25,000. Car chief (Brandon Griffeth) has been suspended from the next Monster Energy NASCAR Cup Series Points Event. |
