Quote:
Originally Posted by white2abbit
All makes sense! I wonder if the S55 will be any different on the highway (drone-wise, gearing, etc.). I drove an M4 for a few days a few years, but otherwise haven't been around that engine.
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He mentioned that his was the MPerformance exhaust. I own the M2C with stock exhaust and ASD still on. If I'm cruising on the freeway in Sport+ mode there is an annoying drone that does bother me on a long trip. A quick press of the mode button to efficient stops the drone which is probably due in some part to open exhaust flap but mostly due to ASD.