HD: Porsche 911 GT3 RS (997) vs Audi RS6 Avant stock (now in HD)
Porsche 911 GT3 RS (997) vs Audi RS6 Avant stock 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
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