Originally Posted by Dackelone
+1. I thought some 1M owners found that the N55 mids seem to solve the drone. I thought thats because the N55 mids have a resonator at the end of the pipe - while the OE pipe does not.
I am not sure if it's the resonator because there is a resonator with the OE pipe too but there is also the cats which N55 mids don't have. Somehow, it flows better and minimizes the drone. Of course, resonator might be different as well but from the looks they look similar. Check photos of both from my install thread, post 2:
"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.