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      11-14-2012, 03:55 PM   #2
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Drives: 2009 335i M Sport Sedan 6MT
Join Date: Aug 2008
Location: Bucharest, Romania

Posts: 3,235
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I did a calculation on the Simota (Gruppe M replica) intake filter area and it's LESS than the stock filter area

By the way, the Gruppe M filter is K&N RF-1002 filter. Do the calculations and see for yourself. It's worse than stock.
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