I have a 2.2 and I bought the lsj downpipe from a friend here in KC. Now, I do NOT have SAI but I noticed in my downpipe that the stock one does have TWO cats. I noticed in the SAI sticky thread that a lot of people were saying that only the balts with sai have 2 cats in the downpipe. Just wondering if you by chance knew why in the hell mine has two cats but no sai ( thank god ). Thanks.

BTW: 2008 1LT cobalt.

 

PM is your friend

 

well, I figured i could also get some other input from different people as well....

 

omg not this again. use the ****** PM. for a person to person conversation.....

 

wow what a dick....did you not read the above post i made???

 

Thats cool I was just giving you a hard time just because you addressed it to a single person. Im sure Maven will have a "real" answer for you lol.

 

are you SURE you don't have the sai? if not, then they probably just used the 2nd cat for emissions reasons.

the downpipe should work fine, just make sure the 02 bungs line up. for example, if your stock downpipe has 2 bungs, you will need 2 bungs on the lsj downpipe. if you have one bung on the manifold and the other bung on the downpipe you'll be fine.

 

I understand.....I want everyones input but wanted to make sure he seen the post....hence why the name in the title.

100% sure. yes, I will need to put an extra o2 bung in the lsj downpipe.....since I dont have one on the manifold. I just kind of thought this was very odd which is why i made the thread.

 

08+ went to two cats, 07 was last year of the single cat. all the new ss/tc's have two cats also.

 

One cat is a pre warm cat and the other is your main

the front one gets hot faster than you would believe, that is for cold emissions

 

hmm well thanks guys for the answers.