The Porsche RS Spyder, internally called 9R6, exists only thanks to a customer order made in 2004 by Penske Motorsports, a subsidiary of Penske Racing. The 9R6 was built according to the Le Mans Prototype class 2 (LM P2) regulations and to be raced at the American Le Mans Series (ALMS) in USA and Canada. The ALMS was created in the spirit of the Le Mans endurance races, hence the name of the series.
