This is how it sounds .. http://kryptonitedesign.com/z28/z28exhaust.mpg

 

just get a cutout and any type of headers you like, FLP tends to be the most popular but they are a little more expensive. Perhaps there is truth to "you get what you pay for"

As far as the cutout you'll see more gains than any catback for under $75 with install. Plus its really loud.