Thread: In search of the quietest 1M exhaust...
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      12-07-2012, 06:45 AM   #18
Dackelone
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Drives: 135i Silber mit/Rot 6MT N54
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Quote:
Originally Posted by sparoz View Post
N55 mids
+1. I thought some 1M owners found that the N55 mids seem to solve the drone. I thought thats because the N55 mids have a resonator at the end of the pipe - while the OE pipe does not.
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