The stock exhaust is JUNK!

 

Read this write up 1.2 HP for $600.00
I`am working on some thing right now that should show good numbers and is cheap to do mostly just labour.

http://www.gmhightechperformance.com...lt/page_3.html

 

i dont care really about HP im sure once i get the GMPP intake it will be a good combination. I just really wanted a little more sound but not too ricey and a stainless exhaust. My car is a cruiser car its not my old chevelle so im not wooried about big HP numbers.

 

Chad, Did you get the exaust and put it on yet?
-Pat

 

Yes i did

 

I'm realy thinking of getting my dealer to put the exaust and intake on my 08 next time that I'm in for service. Can you give us a review here? Louder? throatier? Did it come with a new tip? or did you use your old one?
Thanks,
-Pat

 

Here the link to the exhaust theres also a video in it, the video doesn't do justice, yes its very much throatier, and yes came with a nice polished tip.

 

I was the first to install an IMCO and found it only by mistake. I normally run magnaflow on my cars but this time I couldn't hear the radio with it and there was no performance gains. I tried another and it was the same, so finally my exhaust guy threw on an IMCO and i was like WOW! Keep in mind this is a muffler only mod. I would venture to say that by now someone has come up with a cat back, but for me I'm still a little skeptical first of all because the noise and second I'm not sure if they will provide as good an increase as the IMCO for the $$. I know everybody is still yelling about dyno results but for 50$ I'm happy.

 

I am reviving an old thread. I have the SS and there has been talk of a GMPP exhaust making it to the HHR SS...there's one for the HHR, Cobalt, and Cobalt SS...and all are different in piping. I've thought about getting Hahn, but I wouldn't mind holding on to the warranty as best as possible.

I never saw the numbers in here, but FYI from a cobalt thread I read, he baselined dyno and did one after bolt-on and got 12hp at the wheel. That's pretty good and if you went the tour route, supposedly there's no power loss, just a more stock note.

One thing I found odd with the cobalt was 2-1/4 inches vs. 3. I wasn't sure if that was the case across the board. I didn't see anyone mention diameter in this thread. My guess is they're all 2-1/4.

The fact they're made by Borla is interesting, definitely a huge bump in legitimacy.