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3" downpipe

  1. Loss of power after 3" downpipe installation

    94-98 7.3 Drivetrain Problems
    Last weekend I replaced my stock downpipe with a 3" from Diamond Eye & cat delete pipe as well. I had the tranny out to replace the dual mass flywheel with a single mass, so I thought it would be a good time to do it. I have the DIY air filter on order but have not installed it yet. It used...