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exhaust drone

  1. Focus ST Discussions
    so i have had my muffler and res deleted for a few months now and have taken my car on a few 1000+ miles road trips, about to go on another. Around 2.5k to 3.5k rpms the drone is super bad, whole cab is loud, Im looking into getting a resonator or muffler welded on in the mid pipe, but don't...