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I noticed the free rev still hits at 101 decibles at certain rpms and not at the peak rev. I would be concerned about vibrations and drone for any aftermarket exhaust. I have never found one to be totally drone free yet.
I have a borla suitcase on my BMW and I cannot fault the built quality, sound or fitment. However, it does vibrate the center console at mild throttle in the lower rpms and drones a little. Hopefully not the case with this one.
Another point for those who own automatics versus stick. Drone seems more of an issue with autos as they tend to hold a slightly lower rpm more often. Most if not all of these exhausts are designed using manual cars in which it is easy to avoid drone prone rpms most of the time. Just my personal observation from past experience. I personally am tired of loud exhausts that vibrates everything in the car and makes me tone deaf.
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