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      09-10-2012, 06:26 AM   #2
mashimarho
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Doubt it would be length, but drone comes from the mufflers itself. So, your exhaust that claimed to be drone-free has drone issues... Hard to find a aggressive performance exhaust without a drone. I was in the same boat. I believe BMW PE (oem) is the only true one you can find out there. There's a few here and there as well..
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