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I don't think 03-early 04 had cats, mine doesn't anyway.
 

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You are right 03-04 did not have a cat.

Are you looking for a resonator or a cat though?
 

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Yup. 'o3-'04 didn't have anything but a big 'ole muff.
 

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I have had people point out the "cat" on my 00, however it is only a resonator. It exists in about the same place you would expect a catalytic converter. However the exception is it is only there to quiet different frequencies than the muffler alone can do. Its just a sound dampening device. If this is what you are talking about i would suggest just replacing it with straight pipe. It serves no purpose with emissions.
 
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