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Installing the Dinan this week, sound was superb on my last BMW, jury is still out until I get on the 1M. Plan to add the Revozport CF diffuser to hide the exhaust can. Guess you have to ask what is the most important feature to you of this upgrade. Country of origin? Sound/lack of drone. Weight? Fitment?
Plan to take some sound clips after the install as I could find next to no sound bites of the Dinan. GL
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///1M #643 of #740
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