Petit Le Mans race wins and ALMS championships are both on the line for top contenders in the P1 and P2 prototype classes as the final race of the 2012 American Le Mans Series season unfolds here at Road Atlanta.

Muscle Milk Pickett Racing Honda’s Lucas Luhr and Klaus Graf have six wins in nine races, but need to complete 70 percent of the race distance to take the 2012 ALMS P1 manufacturer, team and driver titles.

The defending champion Dyson Racing team, drivers Chris Dyson and Guy Smith and Mazda will be looking for a win and, perhaps, a little break, in the 10-Hour/1000-Mile race.

In the P2 class, a pair of upstarts, David Heinemeier Hansson and Martin Plowman from Eric Bachelart’s Conquest Endurance Racing, have kept the pressure on Scott Tucker’s Level 5 Motorsports. Tucker and co-driver Christophe Bouchut are looking to repeat their 2012 championship titles.

Level 5 has brought in reinforcements in the form of the fabulous flying Franchitti brothers, as former ALMS champion Marino Franchitti and IndyCar star, Dario, join the team in the #95 car.