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Discussion Starter #1
Is there any difference between the 01 and the 02-04 stock Z06 catbacks?

Thanks in advance for any info.
Sunrise
 

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They do have different part numbers, but IMO they are the same. :z:
 

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sunrise said:
So there is a difference other than part number? I thought they were identical?
I haven't to able to find out why. Maybe they changed supplier's (that's just a guess). The 02's and newer are a little louder, but I attribute that to change in the cats (no pup-cats on the 02 & up). They look identical. :cheers:
 

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GM Parts Direct shows the same part number now for all years. :cheers:
 

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I think they used to use different cats. That's what the change was.
 

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ZO6 AL-X said:
I think they used to use different cats. That's what the change was.
01 has a quick warm up cat just below the manifold--02 and later have a new cat that replaces both the 01 pre cat and regular cat
 

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I believe the 02 h-pipe was also changed which has been considered the culprit for the dreaded exhaust jingle that 01s didn't have to put up with.
 
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