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helmholtz

  1. X Pipes and Drone

    Driveline, Engine & DME Tuning
    I'd like to preface this by saying that I know what x-pipes ARE, but what would they do on our exhausts? For example: I did the muffler delete (on my steptronic 325) mod a few weeks back a and from 2000-2500 rpm the drone is atrocious. It literally creates a sound pressure in the cabin that...
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