hey i have 2006 2.2 ls cobalt and i was thinkin on what exhaust i should get should i get a gmpp exhaust with a gmpp header cuz i dont want to void my warrenty i have heard that the gmpp one both a waste of money and doesn make much diff and that it is a good one soes any one have one with headers and how do they feel about it?

 

The GMPP cat-back is nice (have a few buddies who have it), but i've heard the GMPP extrude honed manifold is a waste of $$$.

 

The GMPP catback is nice, but the honed manifold is not gona make a big differance. You need to get a true header if you are going to replace the exhaust manifold.

Also, please search as these have been discussed, discussed and discussed some more.

 

If he has a 2006 LS the GM header is going to be a big improvement over what he has . IIRC the 06 2.2's have that half moon outlet on the manifold with a good chuck of the outlet still there right??

 

I seen that before too, but I think that its only that way by the O2 sensor. In the overall scheme of things, he will probably be able to get 3 times the power gain with a real header.

 

so my ls might get more power than stock with a gmpp header but only a little? and so then the gmpp cat back exhaust it good then what would header would go with it?

 

You can use just about any header and downpipe with the GMPP catback. If you want to reuse the downpipe, you need to look for a shorty header. Midlength and longtube headers usually require a new downpipe. Search around they are not difficult to find.

Aftermarket L61 Cobalt parts

And if your gona do a "full exhaust" like your sig claims, you need to replace the downpipe.