After Ford won the season opener GrandAm has forced them to remove their fron cunards the Ford Rileys can't use them but the BMW Rileys can

"So, what does Grand-Am do before we come here?" rhetorically asked

They took away the means of us being able to put downforce in the car.
After only the first race they take away the dive planes (small, forward-mounted
winglets) we needed to put 'stick' in the front of our cars. The Chevrolet guys
had 'em. The BMW guys had 'em. We didn't."