I hear a fluttering sound 3-4k rpm in like 2nd/3rd/4th gear. Not sure if something's rattling or if this is just how it's supposed to sound. Everyone else having the same "flutter" sound?
2009 E92 M3 | Alpine White | Black Extended | Advan RS | Turner Test Pipes | Dinan Axle-Back | OETuning | Eibach Springs | UUC SSK | VRS Front Lip | VRS Type I Diffuser | Matte Black | RPi Scoops | MS Filter | Yokohama AD08 | F1 Pinnacle
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