Tigger65

Hi all- Got a 2008 2.0 turbo that the previous owner apparently butchered. Can't find a cat converter, stainless pipe welded in to replace resonator (weld has now broken and car is undriveable due to noise level and fumes) and small section of stainless welded in front of flange on what I believe is a downpipe.
First question: Does one of you have a picture of what a stock exhaust set-up is supposed to look like? Even if it's an advertisement at least it'll tell me what this idiot did to the exhaust.
Second: is the converter always located in the downpipe section on the 2.0 turbo? It isn't anywhere else on this car.
Third: Least expensive option to replace resonator pipe and converter pipe?
Thank you in advance for any help.

Oldblue

Check the classified ads, someone had factory down pipes for sale, yes the cat is in the down pipe

Tigger65

Thanks. I tried but can't seem to find an ad for down pipes.

RJ_RS_SS_350

OB, it's not showing up in classifieds or inactive, very strange. But I did find it in Dave's posts. https://www.chevyhhr.net/forums/clas...s-parts-56996/

EDIT: Now it's showing up again.

donbrew

Here is the drawing. I think 2008 had only 1 Cat, later years had 2,at least LT/LS did.

2005HHRauto

Your 'drawing' is for 2.2/2.4
2.0 always had 2 cats in the DP

Good 10 pages of information on 2.0 DP:
All You Need to Know About Downpipes - Cobalt SS Network

donbrew

That is what Mitchell provided for 2008 SS.

I thought I saw a turbo in there, but that is the water pump.

donbrew

This is what AllData shows for 2008 LNF. The full exhaust is obviously wrong. I have never looked at one.

Tigger65

Wow. Thanks for all the help. That tells me the previous owner must have changed the downpipe. Mine has some kind of plate bolted over an extra output that doesn't make any sense. And there is no expanded area that would indicate a cat. I don't understand how the computer tolerates the readings without a cat. First order of business is where to find the resonator pipe section. Don't need entire cat back exhaust. Just first pipe with resonator. Any ideas?

firemangeorge

If the previous owner did a cat delete, they most likely did a computer "tune" to make it work with that catless exhaust setup.

Now, if you go back with a cat system, you may have to retune back to a stock type tune.
Maybe some of our tune smart members here can help you out with this.

One of the downfalls of buying a modern day used car that's been modded. Not knowing exactly what's been done to it.