ok so i started out with a the hahn 3in catback i know i know way to big for a STOCK cobalt and it did indeed make it sluggish down low after adding a CAI it helped a little but not very noticable it was still pretty sluggish now last week i had a GM stage 2 installed and now i love it the stage 2 gave it that extra little bit and it pulls pretty good down low im now very happy with my choice on the 3in HAHN catback absolutely love the deeper sound the 3 in gives

 

Cant go wrong with a 3" exhaust man! That exhaust note is almost priceless =P Congrats on the sick ride.

 

I Have The Hahn To And Only Other Mod Is An Intake And It Is Still Sluggish I Wanna Go The Stage 2 Route Too U Got Any Vids Cause Ure Car Obviously Sounds The Exact Same As Mine

 

no vids right now man dont have a video camera ill try to record a couple on my phone sometime soon and ill post them up but yea stage 2 or bigger is the ticket for getting the low end to pull with a 3in...might just be me but at idle it makes the exhaust sound deeper and a little louder doesnt really change the note tho while driving youll love it with the stage 2 for sure

cant wait to get some more mods now i love what stage 2 did to it...it runs now and is much smoother, nates 2.9 pulley next