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  1. Funky Vibration/Exhuast leak? - only on Interstate

    Problems & Troubleshooting
    In the last 2 weeks I've developed an awesome funky vibration/exhaust leak sound. Car is an 04 - stage II - only suspension mod is a progress rear sway bar - 80k miles... The noise only appears on the interstate after a couple minutes of driving. It starts as almost a drone/hum/low vibration...