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Get a "Track Pipe" from Frank Fahey (archive)
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Posted by JakeS on March 15, 2001 at 13:55:38:

In Reply to: Lose the "Cat" posted by Rundel on March 15, 2001 at 12:36:42:

You might want to install flanges on the track pipe and the other components of the system so you can swap the pipe and the cat in and out, depending on what you are doing.

The O2 sensor is 3-wire, meaning it's self-heating and probably doesn't need heat from the cat. So don't worry about it, it stays.

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