I have looked around the internet for a while now and was wondering if the catalytic converters (downpipes) are universal or able to swap from my 03 coupe to an 05 sedan. Reasoning behind it is I'm trying to sell the sedan but it wont meet emissions in GA due to the P0420 code. Thanks.

 

They're all the same, swap away.

 

Awesome thanks

 

You can also use cats from 03-07 coupes and I believe 03-07 350Zs.

And you're welcome.