Alright so ive been doing some research on my next exhaust and have been able to lower it down to 2
The DC Sports cat back
DC Sports Exhaust - Chevrolet Cobalt Stainless Cat-Back Exhaust - DC Sports Exhaust
The Tsudo n1 cat back
Tsudo 2005-07 Chevrolet Cobalt LS/LT/LTZ N1 Performance...