Yeah, i forgot about that. Ask those guys for more info, but i think it wouldnt be cool to run a 3" cat and then 2" stock pipe (exhaust). You can always get a custom exhaust LOL
But i would contact them and ask more question about it

 

Ok thanks alot for all your help.. Hey how bout a exhaust system like apr or awe do those come with the cat and everything and will that pass emissions even tho its an aftermarket exhaust?

 

I think im going to try this:

http://www2.partstrain.com/store/?N=...4294967259+874

hopefully it will work. i can get the cat and both O2 sensor for before the cat and after the cat for about $480... what do you think?

 

If u wanna stay stock then it is good. If u planning on doing mods, our oem cats is very restrictive, thats why a lot of people get testpipe or highflow cats.

 

well im still getting the P0420 code after changing the Cat and both O2 sensors... Is it because i didnt get it directly from the Dealer, shouldnt be right????? What else could it be though??

 

Which one did u ordeR?

 

I ordered the Eastern Catalytic converter (direct fit for 02 A4) and the 2 Bosch O2 sensors... and i didnt know about the Federal Emission Warranty for 8 years/80,000 miles... **** my car almost has 65K... but now they might not do it cause i already replace all dat shiet...

 

was that an oem cat just from a different place???

 

i dont know... I think the brand name is Eastern Catalytic converters... i bought it from Partstrain.com... it said direct fit but i dont know if its OEM. i dont think so tho....

 

Are u misfiring at idle?