I know it'll blot on . but what can expect power wise

 

Not too much....

 

Ok. im not expecting to much. but how bout sound?

 

i got one on mine along with the ss/sc down-pipe and its pretty quit but with wide open throttle and higher rpms and my k&n typhoon sounds like a beast, has a good roar

 

i don't understand, bc its 2.5 mostly n 2.25 above the axle? and people buy the 2.5 exhaust n the gmpp is proven to give 11 wheel hp, n thats 2.25.

 

Hows your acceleration? or difference seem?

 

i have the ss/sc cat-bak heres a clip, nut i have a magnaflow muffler on mine and ive got rid of the resonator. if you dont like the bit of scratchiness leave the resonator on. but its louder that way, i likey.

http://youtube.com/watch?v=8Xgs_UFb7UI

 

i have a stock s/c exhaust off of mine....ur far tho so i think itd be pricey to ship but i'd prolly sell it...if i don't thro it out first

 

I'll keep you in mind. im getting the exhaust free just paying shipping about $35

 

yea i'd prolly do it that way for someone a lil more local cuz mine jus sits in the storage unit i got an is goin to waste i'd rather give it to someone with a lower grade cobalt an help em out

 

well mine is an automatic havent really noticed much on the acceleration, but it has added more power. the only mods i have added to mine are the k&n typhoon short ram, ss/sc down-pipe and cat-back. with those few mods the car has more power and is a lot more fun to drive. oh i also got the ss/sc wheels and sportlines.....mildly modded.......got a header/downpipe combo on order, and a 2.4 intake kit.

 

Nice. Well worth it for that price.

 

HELL YEAH!

 

But the GMPP is also a complete flow through design, I doubt that can be said for the stock SS/SC exhaust.