31 August 2007: The Penske Motorsports Porsche RS Spyder, driven by Saascha Maassen (DEU), followed by the Dyson Racing RS Spyder, driven by Butch Leitzinger (USA), at the Detroit Sports Car Challenge presented by Bosch, Detroit, MI
Photographer: Mark Scheuern/Icon Sportswire
File Size: 1.67 MB @ 300dpi
Image Size: 4288 x 2848
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