BMW M5 F10 vs Porsche 911 GT3 RS (450 HP) Mantorp Park shorter battle
http://www.m5board.com/vbulletin/f10-m5-discussion/203659-bmw-m5-f10-weekend-starting-today-what-should-i-do-monte-carlo-blue-bmw-m5-f10-you-guys-m5board-com.html BMW M5 F10 vs Porsche 911 GT3 RS (500 HP) Mantorp Park shorter battle
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