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I would echo BMRLVR comments. There is no drone. I would say that when cold it sure has a bark. But when warm does not sound as loud. Almost like a valve that closes after the engine warms up. Certainly it is louder than Stock but from my autocross the people at the start line say that the car doesn't sound like a bmw and isn't that loud. Fabulous exhaust. I think. and certainly feels like more HP.
Felix
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