On the 5 they leave the resonators for what ever reason but for the 3 and 4 series they are removed .
Quote:
Originally Posted by aadum
I don't have MPPSK but I have remus exhaust and removed resonator.
There is no drone. However REMUS keeps functionality of original exhaust with clamp in exhaust so I can close it while in comfort and open when in SPORT if droning on highway. But even when fully open it is not droning.
I have seen people complaining of MPPSK being too quiet lately (updated version)
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