Audi drivers Lucas Luhr ansd Marcus Werenr clinched the P1 series points race after the car of teammates Emanuele Pirro and Marcel Fässler was dsiaqualified for failing to meet minimum post-race weight.
The ALMS Series Detroit Sports Car Challenge ran on the Belle Isle street circuit, a tight, bumpy 2.1-mile, 14-turn course with no real high-speed sections, where the P2 and GT2 cars had a chance to compete head-to-head with their more powerful—but heavier—P1 and GT1 brethren. On average, the P2 cars qualified one mile per hour faster than the P1 cars, while the GT2 cars qualified on average one mile per hour slower than the GT1 cars.
P2 cars held the first seven spots on the starting grid, ahead of the series-leading Audi of Lucas Luhr. Acuras held the first four spots, with Scott Sharp/David Brabham Patron Highcroft Acura on the pole. This made for extremely close racing and extremely difficult passing.
