Of course, there is also the fact that lots of aftermarket exhaust and/or mid pipes minimize or totally cure the drone in 1Ms and they still have this cavity in place as it is from factory. I remember someone posting his findings a year or more ago when the drone threads were ultra popular and he was talking about similar stuff.
Since my drone is gone after new exhaust, I can't go and experiment now!
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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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