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With a stock muffler, you will have no drone whatsoever. When you're on the throttle, yes there will be more volume but when cruising at any rpm (besides the known 2k drone with stock setup) it will be just like stock.
Pick which x-pipe you like best, I'd suggest replacing the whole thing. Look into a quality manufacture (Gintani, Fabspeed, Akra) and see which one fits your budget.
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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
Special Thanks: Gintani | OETuning | eAs |