You will spend more for a down pipe and plog than you will for a full set of headers. Look up blue guys safely modding your 3800!
I have an Overkill tune and it is very impressive. Just have to tell Wil what you want tuned out.
Fter talking with Many local mechanics, Intense Racing, Modern Performance, and a few radiator shops, I decided on the Dexcool, just for the fact its never had green, and there has never been an issue.. All Im gonna add to that is the intense 180* stat and Amsoil coolant boostGreen stuff FTW!