I was about to install the Downpipe from an 2.0 SS on my 2.2 I noticed that my 2.2 has two O2 sensors and the DP from the 2.0 only has one. Also the 2.2 has two cats. Can I install the 2.0 dp if so what do you do with the second O2 sensor?

 

the 2nd o2 sensor on non air injection cars is on the manifold. on air injection cars there's 2 on the downpipe. only way to fix it is to tap the pipe and have a bung welded in.

 

You mean SAI? I dont think I have that here are some pics of my Engine.



I realized I need to install the 2.0 header and downpipe together so I have a place for both O2 sensors to plug in. The 2.0 header has a place to screw in the O2 sensor while the 2.2 plugs the the O2 sensor in the top of the down pipe. Its still wierd to have the 2 cats though.

 

Do you have an xfe?

 

No its a 2LT

 

the DP wont work w/out a LSJ header, ur mdoel cobalt came with the 02's in the dp, the other cobalts have 1 sensor in the header, the other in the dp, and u just happend to be a model with it in the dp, so u need a lsj header, btw i have 2 of them sitting in my garage right now

 

not true !!!!! at all i have an 07 2.2 LS okay have the bung welded in its what i had done...the DP bolts right up to ur stock manifold....! no codes yet and dont forget to take off the batter negative and let it sit for like 10 min after its done....

 

u can also to that, pay 7 bucks for a bung, than pay a shop to weld it the DP and ur set, should come out to ~50bucks in the end...

 

I have both the LSJ header and downpipe I just didnt notice the bung on the header. OOPs my bad.

 

its okay just have that welded in! it sounds great and you should notice it in the top end for sure!