Has anyone heard of performance chip upgrades for the '03 CTS 3.2L? I am willing to give up a bit of my mpg for more horses.

 

These guys distribute Florida Superchips.
About Us - AutomotiveHighPerformance.com

Also look in to K&N filters or volant filters. Also check with our other sponser magnaflow for exhausts and cold air, etc. Just click on sponsers at the top of this page, you will get some ideas.

G.A.R.Y.