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  1. 01Superduty

    Catalytic Converter

    The 03' 6.0's actually did come with a cat...or at least my dad's had one on it.
  2. 01Superduty

    Exhaust Systems

    I've got a Magnaflow 4 inch system on my truck and I love it. If you want a quieter system its the way to go. But I am thinking about putting a different muffler on so i can get some more noise. With any of the MBRP, Magnaflow, Silverline, etc. I think you will be extremely pleased. Good luck.

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