I have an 07 ss/sc and I was lookin g to get a header downpipe combination. I have been looking at the Hahn unit but I am a little concerned about resonance and a louder exhaust. Will this be something i will notice if i leave the rest of the exhaust stock? Thanks

 

there is no such thing as a quiet header. yes it will be noticeably louder

 

It's definitely not going to stay quiet if you put a header and DP on. Leaving the stock exhaust on would be pointless after the header and DP because you'll still be constricting the exhaust when the whole point was to free it up.

 

Maybe go with one of those cut out things where you press the button and it opens the exhaust before tthe cat. then you have power when you want it and quietness for everyday driving.

 

something must be wrong with my car, my pacesetter header made my car quieter..lol