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Cheapest way to get a better sound on X6M
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03-31-2013, 06:54 PM
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raducu
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Drives: 2010 X6M
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any updates on this mod? I doubt you lose torque because the flap opens when you press the M button, so it's designed to open for louder exhaust when the M button is pressed.
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2010 X6M Space Gray
2007 335I Black
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