catalytic converter

  1. B

    Cat rattle ?????

    My 2004 GT has this rattle at about 1500-2000 RPM with medium load. It sounds almost like a loose heat shield but I feel like that would be much more noticeable. I already had the driver side rear cat go bad and throw code, but I used O2 sensor spacer to get the code out. Could it be the inside...
  2. shovel

    Video about welding new cats into a burned out BBK midpipe

    Just in case anyone's interested.
  3. C

    Smog pipe? Air pipe?

    I recently deleted my secondary cats, still have the first. I cut em out and an exhaust shop welding some straight pipes in. They also welded the pipe that used to connect to the cats up. Is this going to be an issue? ( All I'm imagining in my head is pressure building up in this tube and...

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