The 00-04 has two cats. One right off the manifold and one farther down the pipe.
http://www.pwr-tech.com/parts_exhaust.html They claim 8hp increase. It's technically against the law to remove a properly working cat converter from your car for any reason, so they say for off road use only. It has been said that you will pass emissions testing however you may not pass visual if you have one.
This is the bypass pipe he is refering to, I don't think those are resonators. The pre-cat is right off the manifold like this:
Thanks to 986online our great sponsor for that pic...
He wants to pull off the secondary cat with the pipe in the first picture.
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