May 17, 2011 Audi R8 Challenge Extreme Edition by STaSIS Edit Delete Tags Autopost Designed to deliver pure driving adrenaline, the Challenge Extreme has an Eaton supercharger, a revised ECU and a stainless steel sport exhaust system. Source: http://feeds.worldcarfans.com/~r/worldcarfans/Jxfz/~3/iVWoYkoLxoc/audi-r8-challenge-extreme-edition-by-stasisEdgar Barth Giorgio Bassi Erwin Bauer Zsolt Baumgartner Elie Bayol