HD: Porsche 911 GT3 RS (997) vs Mercedes E55 AMG Kompressor
http://www.m5board.com/vbulletin/e60-m5-e61-m5-touring-discussion/127290-latest-gtboard-supercar-shootout-audi-rs6-lp560-4-997-turbo-997-gt3rs-m5-more.html HD: Porsche 911 GT3 RS (997) vs Mercedes E55 AMG Kompressor
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