I am on Evolutionm.net, and no I dont bother them, I do photoshops for people on their also,,,,

 

General rule of thumb.

Less back pressure = more horsepower, less torque, more noise.

Greater back pressure = less horsepower, more torque, less noise.

Results will vary on different RPM's.

 

uh oh I think I may be getting this, just maybe. Has anyone heard it on the HHR or does anyone have it?

 

Aftermarket magnaflow from any of supporting vendors is cheaper than the GMPP exhaust. I was considering ordering this from the dealer, but my chevy dealer's web site marked it up to almost 800 dollars and over $1000 installed what a ripoff.

 

Well I found it for 677.00 I can install myself plus I have had borla on two of my cars they make a very nice exhaust, I just want to hear it.

 

I have a recording of a Cobalt on my dealership's website, I cant tell you what model Cobalt though. It's just one Chevrolet recorded.

 

is it the same exhaust?

 

same exhaust, but it could be on the 2.2 or 2.4 engine, so it might sound different.

Here it is:
http://www.gmaccessories.net/bobbymu...erformance.mp3

 

damn that sounds good nice and throaty

 

i found this one on youtube its a ls cobalt with 2.2 engine and gmpp exhaust so i suppose it will sound like this.

http://video.google.com/videoplay?do...arch&plindex=5