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      05-22-2013, 07:48 AM   #5
primetime1
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Drives: BMW 550i F10
Join Date: Jan 2013
Location: Miami Beach

Posts: 95
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catless youll get some exhaust fumes with windows open but on my 550i it made a huge power difference.. I will also be going catless on my M5 as soon as I get it next week.!!
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