I am an engineer here in Detroit and my father is in the advanced development group at GM. He is currently working with the company that is building GM's new race Cobalt SS and testing a lot of the GMPP for the Cobalt SS/SC. He was at their facility yesterday and was talking to their lead engineer about my car and the mods that I have done and am thinking about doing. He told my dad that the GMPP performance exhaust was built by Corsa and in their testing have seen an 8hp gain at the wheels. The exhaust manifold had also been tested and provided a 6hp gain at the wheels. He also warned that if the car exeeded the 300hp point, it would be unsafe to run with the stock wheels/tires. He recommended that wider wheels (9") be placed on the Balt for stability. They are currenlty testing the Stage III kit for GM, but no details were given about the numbers. He will be going back there next week and I will be sure to give him a list of questions to ask them.

 

GMPP exhaust are made by Borla, it remove some credibility to your story

 

You have proof on that?? If you wanna call me out, prove me wrong. Borla does make some of the GMPP exhausts (mainly truck), but the Cobalt SS performance exhaust is a Corsa. I was just trying to let people know some real dyno numbers for the parts available for the SS/SC.

 

it is corsa last time i checked

 

*cough* *cough* it's Borla *cough*


and we need 9" wide rims..... that's 275-285 tire territory, when you put those on a stock cobalt let me know cause i want to see pictures

 

6hp seems a little low for a header no?

 

Yeah guys it is Borla. It's a fact. These pics will help with the proof of that. Spitting image!
Anyway. Those numbers sound good.

GM EXHAUST!



BORLA EXHAUST!

 

I don't think anyone will see 6 whp off the GMPP manifold. Many people are reporting 3-5 whp off their baseline but to get a consistent 6 with no supporting mods seems suspicious to me.

 

lol I spit on your image I am french so **** off uhhh huh huhhhh (french accent)

 

 

The corsa exhaust is/was also sold as a GMPP product though wasnt it? I SWEAR I saw it on gmpartsdirect.com

 

the cobalt racing team is using a 3" Corsa exhaust (not available for sale) just like the time attack coablt did.
the GM exhaust is a Borla exhaust (2.5").

 

er...

This may just may be me... but why would gm have a "Touring" exhaust? Doesn't that sound familiar to the Corsa Touring exhaust..?

http://www.crateenginedepot.com/stor...P1382C144.aspx
"This GM Performance Parts Cat-Back exhaust system is sold...."

 

Come on bro that has nothing to with it. Touring isn't as loud as performance that's all.
Look who ever doesn't believe GM exhaust is made by Borla just call Tom at crate engine depot. He will tell you. Done deal.

 

Yeah Borla is what we got. I think the Vette is GMPP Corsa, not sure tho.

 

word <--

 

I will, here is the PROOF GMPP offers a Corsa, but it is called a Corsa. Borla makes the GMPP cat-back 17802111 and 17802110, check out the lower right corner it says "Borla Performance Industries". And thanks, I've given this forum real dyno numbers for this and a few other mods (Click this)

 

Vettes are Corsa GMPP. CORRECT!

 

pwned

 

so tell us again what you and your dad do ohsolo

 

Doc is correct

 

i'd be interested to see in what is included in the supposed stage III kit

 

[QUOTE=selfinfliction]so tell us again what you and your dad do ohsolo /QUOTE]

I am going by what I have been told from the shop who is working on the Cobalt right now. I stand corrected that the information I received was incorrect regarding the manufacturer, but the numbers are correct. The information I received was second hand. Maybe he thought I have the 3"...I don't know or maybe he was just blowing smoke. I will post the dyno sheets from these runs next week when they get faxed to me.

 

Yeah well stage 3 info would be great

 

well all i wanan know ppl who have the gmpp exhaust is it good and have a good sound im thinkin of buyin it for my ss s/c balt but idk wat to get