Interesting...
"Porsche has been successful in many branches of auto racing, scoring a total of more than 28,000 victories. Porsche is currently the world's largest race car manufacturer. In 2006, Porsche built 195 race cars for various international motor sports events. In 2007, Porsche is expected to construct no fewer than 275 dedicated race cars (7 RS Spyder LMP2 prototypes, 37 GT2 spec 911 GT3-RSRs, and 231 911 GT3 Cup vehicles). "
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