i know replacing the stock exhaust on my gt will greatly improve sound quality, but when i add headers will the sound change again or does that depend on chaning out the mid pipe with a high flow cat? so basicly will the car sound better with headers and new mufflers with out replacing the mid pipe?

 

Headers will change the sound. The tone and volume.

 

i installed shortys and the sound changed extremely minimally. You can barely notice it. Definately a good change tho.

 

+1^

 

Go with L/T's. Check out my video section post with vids and sound clips.