Quote:
Originally Posted by Chapman1977
That's exactly what I have red somewhere - high flow cats in the 1M in the DP's as well as in the mid section...don't ask me where though.
Cheers
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Even if the mid pipes are also "high flow" they are no where as high flowing as a catless midpipe, N55, Maddad etc. Plus they contribute to drone syndrom very much, since just a mid pipe change cured most if not all of the drone issues among many users. So, I would say mid pipe should definitely be the first mechanical part (together with charge pipe they say, but I will take my chances on that one till my warranty expires or the thing just fails) to go in the case of a stock 1M, high flow or identical to regular N54 mids do not change this fact.
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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.