RYRO14

Will a Cobalt SS DP fit an HHR SS? Is the overall exhaust the same?

asanti

yup

2005HHRauto

YES for the 5 speed trans, they all interchange.

HHR auto DP is 1" longer, also the HHR auto 1st cat is in a slightly different location & angle.

A 5 speed DP in an auto HHR will have the 1st cat slightly rubbing againest the sway bar. And the stock cat-back will rub at the gas tank, unless you add 1" in length of the cat-back in the resonator section of the stock cat-back.
The Magnaflow cat-back will work ok, no adjustment needed.

thumper36

So any of the cobalt ss t/c exhaust systems will fit the hhr ss 5 speed? Just want to double check.

bartSS

yes sir. We run the same exact chassis. We can also use the same lowering springs ect

prod

Interesting and good to know. Now Im wondering if the gmpp exhaust for the cobalt will fit my hhr auto buy adding that 1" section. They are cheaper and easier to buy than the hhr gmpp exhaust.

thumper36

Thats what I thought, I just wanted to make sure because now I can look at some cobalt ss mods. For some reason, the makers of some of the dp's and exhaust dont ever state that they are interchangeable. Thanks

2005HHRauto

HHR & Cobalt cat-backs are slightly different too...
You can 'make' either one work on the other...

IgottaWoody

Yup......torch...the magic wrench!!!!

2005HHRauto

What's really weird is that there is a difference internally, between the auto & manual SS mufflers.
More rows of 'holes', for better sound control on the autos.
This muffler would've been ok for both...
That's how the old GM wastes money...
I guess since they had to shorten the auto SS cat-back by 1", they might as well 'dick' with the muffler too...