COTA Continental Tire Challenge Pack

COTA Continental Tire Challenge Pack

A pack of cars battle for position during Saturday's Continental Tire Sports Car Challenge Series race at Circuit of the Americas in Austin, Texas. (Grand-Am Photo)

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A pack of cars battle for position during Saturday's Continental Tire Sports Car Challenge Series race at Circuit of the Americas in Austin, Texas. (Grand-Am Photo)

A pack of cars battle for position ...

Drivers in both the Grand Sport and Street Tuner classes battle for position during the Continental Tire Sports Car Challenge Series race at Circuit of the Americas in Austin, Texas, Saturday. (Grand-Am Photo)

Drivers in both the Grand Sport and...

Bill Auberlen & Dalla Lana celebrate after winning the Continental Tire Sports Car Challenge Grand Sport class at Circuit of the Americas Saturday afternoon. (Grand-Am Photo)

Bill Auberlen & Dalla Lana celebrat...

Stevan McAleer & Marc Miller celebrate after winning the Continental Tire Sports Car Challenge Series Street Tuner division at Circuit of the Americas in Austin, Texas, Saturday afternoon. (Grand-Am Photo)

Stevan McAleer & Marc Miller celebr...

The No. 94 Turner Motorsports BMW M3 leads a pack of cars through a series of corners at Circuit of the Americas in Austin, Texas, Saturday. (Grand-Am Photo)

The No. 94 Turner Motorsports BMW M...

Paul Dalla Lana & Bill Auberlen drove to victory in the Grand Sport class of the Continental Tire Sports Car Challenge Series race at Circuit of the Americas Saturday. (Grand-Am Photo)

Paul Dalla Lana & Bill Auberlen dro...