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I have N55 mids plus Evolve Race muffler, it has almost no drone now, big improvement. Stock set up had quite annoying levels of drone, at a large band, let's say between 1900 to 2900. Since I installed mids and muffler at the same time can't really say if it is the Evolve muffler or the N55 mid that helps minimize drone, could be both together as well. It does not disappear all together though, but I don't mind just a hint of it.
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"The mark of a great car is one whose overall competence exceeds what you should expect from its individual components and the 1M does just that", Chris Harris.
BMW 1M-SOLD-: TECH: Evolve Race+N55mids, Evolve IC, Michelin PSS, ER cp, aFe filter, CDVx, Vorshlag camber plates, BMS OCC EXTERIOR: trunk spoiler, blacklines, black grills, IND goodies INTERIOR: Alcantara steering wheel, steel pedals, custom mats, MPower e-brake.
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