So I am a little confused with the whole exhaust ordeal with my car. I have looked at alot of threads and if I remember right there was this one thread saying I don't need bigger than 2.25" piping. What is the stock size? Are there dyno sheets for exhausts that are made for the cobalt ss? Any help would be appreciated. Yes I realize I am a newbie to the site but I tried researching first.

 

send me a pm with your mods. I responded to your first pm.

 

Thanks for the reply. I replied back to you with my mods.