What seems to be the best exhaust layout for the cobalt??? and which cat back has the best gains??? 2.5 a 3in? Come on Cobalt gurus help me out.

 

How much do you wanna spend? You can get a basic system for very cheap (not cheap product, btw) and have your local muffler shop weld it together for reliability (It comes in two pieces that you clamp, but that clamps just dont hold well) and that runs only a couple hundred...

http://www.mandrelexhaustsystems.com...GNAFLOW/Detail

you can get the corsa (alot of people like that one) but seriously, way too expensive... just get the cheaper one and have a resonator (you can get a mufffler shop welded in for cheap, esp if you get it all welded at once)...

unless your pushing 300 hp (which i dont think you are yet) i wouldnt go with a 3"... once you start getting higher up id look into it, but a 2.5 should do you just fine.

 

I have 3in piping with a Tsudo exhaust but everyone tells me that my exhaust is only making sound because I am running stock. I love the sound of it but performance comes first. I was thinking Magna flow.

 

what are your other mods? im not sure what your trying to say...

 

2.5-2.75 the bigger the pipe the cooler the exhst is which will get hurt flow. the hotter the gases the faster exhst will flow, many people dont understand this. you will see better gains with a 2.5 than a 3inch cat back. magnaflow has the best sound in my opinion, and thats what i run, only its a custom exhst, but the magnaflow system will be about the same.

 

I do plan on pushing over 300 hp so what would be the best 3in exhaust put there? Hahn race craft sounds good. Vibrant sounds the deepest. JBP headers sound amazing but how does there full exhaust sound???

 

CTI is where its at, its a in between exhuast in terms of loudness. The car loves it though becuase its a longtube

 

Stock catback, aftermarket header with catted downpipe.