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Here are some sound samples of the 034 MotorSport Resonator Delete on a 2017 Audi A4 B9 2.0t. Cold start, driving in the cabin cold, and driving warm. Spoiler: you hear sound between 2k-3k RPM especially when it is cold and you hear audible burps between shifts when you are hard on the throttle. No sound difference at all at freeway speeds (no droning).