no complaints with my MS filter. Not sure about other filters but I get a really nice throaty sound when accelerating between 3k and 4k rpm. A nice bonus.
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2010 M3 Coupe - Jet Black on black interior /// Escort 9500ci /// Macht Schnell - Stage 1 Intake Charge Kit /// DEPO Smoked Front Reflectors /// Black Satin Chrome Edition front/side grills
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