Custer, who has achieved victory twice in NASCAR Xfinity races this year, has incurred a deduction of 20 points for both the driver and owner due to the L1-level penalty.
Furthermore, both the driver and the team have received a deduction of five playoff points, causing their total to decrease from 15 to 10.
Jonathan Toney, the crew chief, has also received a fine of $25,000.
Custer competed fulltime in the Cup Series from 2020 to 2022, winning once at Kentucky. He has now returned to the Xfinity Series, where he has 12 career victories. He currently sits fourth in the regular season standings.
NASCAR says the No. 00 Ford violated Sections 14.4.3 C & H: Splitter of the NASCAR Rule Book, stating in the penalty report: “Except as specified, splitters must be used exactly as supplied from the manufacturer.”
Stewart-Haas Racing has decided not to contest. There were no additional sanctions given after the Michigan race event.
After the Cup race, Joey Logano’s Ford from Team Penske, numbered 22, and Kyle Larson’s Chevrolet from Hendrick Motorsports, numbered 5, were transported to the R&D Center for additional examination. However, no problems were discovered.