I am a newbie and asking a question about headers that i am not sure of. I have a 2005 cobalt ss/sc with a stage 2 gm kit(bought it this way). It currently has a vibrant header and downpipe. I want to get the 3 in zzp catback exhaust but i am not sure if it will fit. Any suggestions or comments would be appreciated.

 

It should bolt up just fine. Is it the header/downpipe? Also is it 3inch? I think 3 inch exhaust is a bit too much for the powerlevel you'll be at. You should be good with 2.5 inch

 

I dont know what the downpipe size is. That is why i was asking if the vibrant downpipe is always 3 inches or 2.5. Also the reason i am going with the 3 in zzp catback is because later this year i will be doing a turbo swap.