hey guys i got a question...my cars got the two cat dowpipe on my car...does anyone know if the ss downpipe will swap just fine and im sure im going to need a tune since the cat systems must be different? i just need some help with this guys...thanks in advance


ps if im doing a tune im doing a 2.4 throttle body and an ss header and downpipe.

 

anyone ? bump

 

whats the bolt pattern on the LS? for the downpipe
i took my SS downpipe off and its a triangle bolt lay out
it has a huge ass cat and idk how your header out let looks for matching up
hope this kind of helps haha

 

yeah its the same pattern tri bolt up top near manifold and two bolt near catback

 

yee thats it, if u do this make sure the top of the downpipe matchs up like pipe size and gasket and all match up. i blew a gasket on my aftermarket downpipe and the stock gasket was too big haha, but i got a better gasket problem solved haha
u should be able to bolt up no problem just check the specs and stuff

 

even tho theres two cats on my downpipe and only one on the new one i shouldnt have a problem?

 

two cats? damn haha it should be fine it wont be as restrictive cuz the cat helps keep noise down haha thats why catless cars are freaking beast.
i have a 2.0l supercharged cobalt and im not familiar with the 2.2l motor but it should be similar as u will just be running a single cat and have better air flow
heres a pic of my vibrant downpipe and the lsj (stock) downpipe

 

You shouldnt need a tune. Just find a dp from an ss that is the same year as yours and there should be no issues. Everything should just bolt up just fine.

I just noticed your an 06 I would try and get a ss mani also.

 

no tune needed year doesn't even matter they all bolt up just fine

 

The LSJ downpipe will bolt right up yes... as will any aftermarket for the S/C motor.... now the LNF no!

 

The only reason the year matters is o2 sensor locations. If he does a mani and a dp it doesnt matter but if he only does a dp he should find one off an 06 so everything matches up.

 

I dont know about other years but my 07 has both sensors in the downpipe. I had to get a lsj exhaust manifold to match because the lsj dp has one bung for sensor.

 

This is correct...look into the positions of your O2 sensors! Also get a DP for the type tranny you have...auto tranny equipped Cobalts DPs are longer than the manual tranny equipped Cobalt DPs. If you want to insert a DP from a manual car into an auto car you'll have to do some fabrication.


This is on the 2.4L Cobalt...the 2.2 has the same issue:
https://www.cobaltss.net/forums/show...&highlight=LSJ

 

the downpipe im gettin is from an ion redline i assumed that essentially an ss downpipe...and i already checked i have one o2 on my mani and the other on my dp

 

look at all the help now Holyjerex haha good luck with the install

 

Since you have a manual you'll be good to go...

 

lol yeah man glad you guys are around for all this technical bs..wish these 2.2s were more simple to mod like my LT1 i can find thousands of parts from old small block chevys that work its great

 

can u use the stock lsj exhaust of a redline or is it routed different under the car?

 

ive got a 06 SS dp if your other deal falls through.