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Picked up my X5M today!!!
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03-27-2010, 08:55 AM
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TAREK69
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Drives: 2009 750LI, 2009 X5 3.0si, X5M
Join Date: Jan 2010
Location: DAMASCUS, SYRIA
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Is a 60 bhp gain from only the exhaust system realistic though? I was told it wont matter what system you put on, if you dont do an engine remaping to custom the exhaust you wont get any extra horsepower? does anyone know anything about that?
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