will a NA y pipe fit a T2 i need to do this for smog??

 

90% sure it will. The flange that connects to the main cat is definitely the same, and I'm pretty sure the stock muffler flanges are the same as well. If you're using TII mufflers as well, then you really have nothing to worry about.

 

What's the difference between a NA catback and a turbo II catback?

 

N/A Catback is smaller.

I don't know the exact sizes, but maybe 2 and 2 1/2?

 

You really need to use capitalization, along with question marks in the appropriate places. Also, I'd appreciate if you could avoid run-on sentences, especially in the case where you destroy the intelligibility of what you're saying by making this mistake.

 

ok. thanks anyone selling Y pipe and exhaust?

 

Check the 2nd gen parts section in the for-sale area.