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      01-03-2009, 10:01 AM   #12
PunjabiM3
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Drives: M5 CS
Join Date: Mar 2008
Location: Flower Mound, TX

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I would be surprised if a muffler added any power. Maybe 1 or 2 hp if you must be optimistic. Hopefully it doesn't cause any loss of power! I'm not sure if my Eisenmann Race made any difference plus or minus, but sometimes I feel that my car does not accelerate as fast ever since I installed the AFE filter.
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