Photos: Track tech at the San Jose Grand Prix

All cars in the race use a standardized 1,550-pound chassis known as the DP01, which is manufactured by Panoz. Unlike Formula One cars, Champ Car series race car chassis are allowed to make use of underfloor aerodynamics, which uses airflow to create downforce to stick the car to the track. According to the CDW/RSPORTS team, the current chassis design provides up to 5,000 pounds of downforce--enough suction to (theoretically) enable the car to stick to a track upside-down at high speeds.