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Resonator removed definitely produces a bit of a drone but it is manageable as its not obnoxious. I'm actually thinking an x-pipe might help but you can only get a custom one since most sellers sell 3" or 2.5" and our cars tend to need 2.75" diameter.. However its surprising that Alpina went with no resonators on the B5/B6/B7 cars. Guessing their muffler design compensates for the drone?
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